Functies zijn niet alleen abstract wiskundeconcepten - ze zitten verstopt... Show more
Wiskunde A
Economie
Biologie
Economie en Ondernemen
Maatschappijleer
AardrijkskundeSign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
4
•
Updated Apr 7, 2026
•
Functies en Grafieken: Hoe Ze Werken in Het Dagelijks Leven
1 / 10
Functies en grafieken: Toepassingen in realistische situaties
Functies zijn eigenlijk gewoon een manier om verbanden tussen verschillende dingen te beschrijven en voorspellingen te doen. Denk aan een architect die berekent hoeveel materiaal hij nodig heeft, of een econoom die voorspelt hoe huizenprijzen zich ontwikkelen - ze gebruiken allemaal functieverbanden.
Het proces is simpel: je herkent eerst het verband in een situatie, stelt dan een functievoorschrift op, en interpreteert ten slotte wat de resultaten betekenen. Deze stappen helpen je om van chaos naar duidelijkheid te gaan.
Realistische toepassingen laten zien waarom wiskunde nuttig is in het echte leven. Ze ontwikkelen vaardigheden die je later nodig hebt in vervolgopleidingen en beroepen. Plus, het maakt wiskunde een stuk leuker als je ziet dat het écht ergens voor dient!
💡 Let op: Een functie is een wiskundig hulpmiddel om verbanden tussen grootheden te beschrijven en te voorspellen - meer niet, minder niet.
Lineaire functies in praktische situaties
Lineaire functies komen het vaakst voor in dagelijkse situaties. Ze beschrijven verbanden waarbij iets met een constante snelheid verandert. De algemene vorm is f(x) = ax + b, waarbij 'a' de richtingscoëfficiënt is en 'b' het startpunt.
Neem bijvoorbeeld je NS Flex-abonnement: je betaalt €0,19 per kilometer plus €2,50 administratiekosten per maand. Dit wordt: K(x) = 0,19x + 2,50. Hier betekent x het aantal kilometers, 0,19 zijn de kosten per kilometer, en 2,50 zijn je vaste maandkosten.
Als je 100 km per maand reist, kost dit: K(100) = 0,19 × 100 + 2,50 = €21,50. De grafiek van deze functie start bij punt (0, 2,50) en stijgt voor elke kilometer met €0,19. Deze informatie helpt je beslissen wanneer een ander type abonnement voordeliger wordt!
💡 Handig: Bij lineaire functies heeft elke parameter een concrete betekenis in de praktijk - vergeet dat nooit!
Kwadratische functies en optimalisatie
Kwadratische functies hebben de vorm f(x) = ax² + bx + c en beschrijven situaties waarbij de verandering zelf ook verandert. Ze zijn perfect voor optimalisatieproblemen - het vinden van de beste oplossing.
Een kaasboer in Gouda ontdekt dat zijn dagelijkse winst wordt beschreven door: W(x) = -2x² + 40x - 150. Hier is x de prijs per kilo kaas en W(x) zijn dagelijkse winst. De coëfficiënt -2 zorgt ervoor dat de parabool naar beneden opent.
Om de maximale winst te vinden, bereken je de top van de parabool met x = -b/(2a). Voor de kaasboer: x = -40/(2×(-2)) = 10. De optimale prijs is dus €10 per kilo, met een maximale winst van €50 per dag. In de praktijk moet hij natuurlijk ook rekening houden met concurrentie en grondstofkosten!
💡 Vergeet niet: Optimalisatie betekent het vinden van de beste waarde (maximum of minimum) binnen bepaalde grenzen.
Exponentiële en logaritmische functies
Exponentiële functies beschrijven groei of afname waarbij de verandering evenredig is met de huidige waarde. Ze hebben de vorm f(x) = a × bˣ en komen voor bij huizenprijzen, rente en bevolkingsgroei.
Huizenprijzen in Amsterdam waren in 2010 gemiddeld €300.000 en stegen 4% per jaar. De functie wordt: P(t) = 300.000 × 1,04ᵗ. Na 10 jaar (in 2020) kost een huis ongeveer P(10) = €444.000.
Logaritmische functies zijn het omgekeerde van exponentiële functies. Ze helpen beantwoorden: "Na hoeveel tijd bereik ik een bepaalde waarde?" Voor €500.000 in Amsterdam: t = log(1,67)/log(1,04) ≈ 13 jaar. Het logaritme van een getal is simpelweg de macht waartoe je het grondtal moet verheffen.
💡 Onthoud: Bij exponentiële groei betekent b > 1 groei, en 0 < b < 1 betekent afname.
Praktische oefeningen en toepassingen
Nu ga je zelf Nederlandse situaties analyseren met functies - dit is waar het echt leuk wordt! Deze oefeningen trainen je om functieverbanden te herkennen en op te stellen in echte situaties.
Een Nederlands huishouden gebruikt gemiddeld 3500 kWh elektriciteit per jaar. De energieprijs is €0,23 per kWh plus €180 vaste kosten per jaar. De functie voor jaarlijkse energiekosten wordt: K(x) = 0,23x + 180.
Voor een gemiddeld huishouden: K(3500) = 0,23 × 3500 + 180 = €985 per jaar. Dit type praktische toepassingen helpt je begrijpen hoe wiskundige modellen échte problemen oplossen. Je ziet direct de waarde van wat je leert!
💡 Pro tip: Begin altijd met het identificeren van wat variabel is (x) en wat constant blijft in een situatie.
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
Where can I download the Knowunity app?
You can download the app in the Google Play Store and in the Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
Most popular content: Variable
Most popular content in Wiskunde
Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.6/5
App Store
4.7/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
Functies en Grafieken: Hoe Ze Werken in Het Dagelijks Leven
Functies zijn niet alleen abstract wiskundeconcepten - ze zitten verstopt in bijna alles wat je dagelijks meemaakt! Van de kosten van je treinkaartje tot huizenprijzen in Amsterdam, overal kun je wiskundige verbanden ontdekken. Deze les laat je zien hoe je... Show more
Functies en grafieken: Toepassingen in realistische situaties
Functies zijn eigenlijk gewoon een manier om verbanden tussen verschillende dingen te beschrijven en voorspellingen te doen. Denk aan een architect die berekent hoeveel materiaal hij nodig heeft, of een econoom die voorspelt hoe huizenprijzen zich ontwikkelen - ze gebruiken allemaal functieverbanden.
Het proces is simpel: je herkent eerst het verband in een situatie, stelt dan een functievoorschrift op, en interpreteert ten slotte wat de resultaten betekenen. Deze stappen helpen je om van chaos naar duidelijkheid te gaan.
Realistische toepassingen laten zien waarom wiskunde nuttig is in het echte leven. Ze ontwikkelen vaardigheden die je later nodig hebt in vervolgopleidingen en beroepen. Plus, het maakt wiskunde een stuk leuker als je ziet dat het écht ergens voor dient!
💡 Let op: Een functie is een wiskundig hulpmiddel om verbanden tussen grootheden te beschrijven en te voorspellen - meer niet, minder niet.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Lineaire functies in praktische situaties
Lineaire functies komen het vaakst voor in dagelijkse situaties. Ze beschrijven verbanden waarbij iets met een constante snelheid verandert. De algemene vorm is f(x) = ax + b, waarbij 'a' de richtingscoëfficiënt is en 'b' het startpunt.
Neem bijvoorbeeld je NS Flex-abonnement: je betaalt €0,19 per kilometer plus €2,50 administratiekosten per maand. Dit wordt: K(x) = 0,19x + 2,50. Hier betekent x het aantal kilometers, 0,19 zijn de kosten per kilometer, en 2,50 zijn je vaste maandkosten.
Als je 100 km per maand reist, kost dit: K(100) = 0,19 × 100 + 2,50 = €21,50. De grafiek van deze functie start bij punt (0, 2,50) en stijgt voor elke kilometer met €0,19. Deze informatie helpt je beslissen wanneer een ander type abonnement voordeliger wordt!
💡 Handig: Bij lineaire functies heeft elke parameter een concrete betekenis in de praktijk - vergeet dat nooit!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Kwadratische functies en optimalisatie
Kwadratische functies hebben de vorm f(x) = ax² + bx + c en beschrijven situaties waarbij de verandering zelf ook verandert. Ze zijn perfect voor optimalisatieproblemen - het vinden van de beste oplossing.
Een kaasboer in Gouda ontdekt dat zijn dagelijkse winst wordt beschreven door: W(x) = -2x² + 40x - 150. Hier is x de prijs per kilo kaas en W(x) zijn dagelijkse winst. De coëfficiënt -2 zorgt ervoor dat de parabool naar beneden opent.
Om de maximale winst te vinden, bereken je de top van de parabool met x = -b/(2a). Voor de kaasboer: x = -40/(2×(-2)) = 10. De optimale prijs is dus €10 per kilo, met een maximale winst van €50 per dag. In de praktijk moet hij natuurlijk ook rekening houden met concurrentie en grondstofkosten!
💡 Vergeet niet: Optimalisatie betekent het vinden van de beste waarde (maximum of minimum) binnen bepaalde grenzen.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Exponentiële en logaritmische functies
Exponentiële functies beschrijven groei of afname waarbij de verandering evenredig is met de huidige waarde. Ze hebben de vorm f(x) = a × bˣ en komen voor bij huizenprijzen, rente en bevolkingsgroei.
Huizenprijzen in Amsterdam waren in 2010 gemiddeld €300.000 en stegen 4% per jaar. De functie wordt: P(t) = 300.000 × 1,04ᵗ. Na 10 jaar (in 2020) kost een huis ongeveer P(10) = €444.000.
Logaritmische functies zijn het omgekeerde van exponentiële functies. Ze helpen beantwoorden: "Na hoeveel tijd bereik ik een bepaalde waarde?" Voor €500.000 in Amsterdam: t = log(1,67)/log(1,04) ≈ 13 jaar. Het logaritme van een getal is simpelweg de macht waartoe je het grondtal moet verheffen.
💡 Onthoud: Bij exponentiële groei betekent b > 1 groei, en 0 < b < 1 betekent afname.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Praktische oefeningen en toepassingen
Nu ga je zelf Nederlandse situaties analyseren met functies - dit is waar het echt leuk wordt! Deze oefeningen trainen je om functieverbanden te herkennen en op te stellen in echte situaties.
Een Nederlands huishouden gebruikt gemiddeld 3500 kWh elektriciteit per jaar. De energieprijs is €0,23 per kWh plus €180 vaste kosten per jaar. De functie voor jaarlijkse energiekosten wordt: K(x) = 0,23x + 180.
Voor een gemiddeld huishouden: K(3500) = 0,23 × 3500 + 180 = €985 per jaar. Dit type praktische toepassingen helpt je begrijpen hoe wiskundige modellen échte problemen oplossen. Je ziet direct de waarde van wat je leert!
💡 Pro tip: Begin altijd met het identificeren van wat variabel is (x) en wat constant blijft in een situatie.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
Where can I download the Knowunity app?
You can download the app in the Google Play Store and in the Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
0
Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Practice Test ✓ Essay Outlines
Practice Test
Quiz
Flashcards
Essay
Most popular content: Variable
Most popular content in Wiskunde
Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.6/5
App Store
4.7/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user