Pitagorina teorema je jedna od najvažnijih matematičkih formula koju ćeš... Show more
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Updated May 16, 2026
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Pitagorina Teorema: Objašnjenje i Jednostavan Dokaz
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Pojam i dokaz Pitagorine teoreme
Pitagorina teorema je tvoj najbolji prijatelj kad god radiš sa pravouglim trouglovima! Ona ti pomaže da izračunaš dužinu jedne stranice ako znaš druge dve.
Koristi se svugde oko nas - od građevinarstva do video igara. Kad god vidiš pravi ugao, znaš da možeš primeniti ovu teoremu.
Pre nego što krenemo dalje, važno je da razumeš delove pravouglog trougla. Katete su dve kraće stranice koje se dodiruju kod pravog ugla, dok je hipotenuza najduža stranica koja se nalazi nasuprot pravog ugla.
💡 Zapamti: Uvek prvo pronađi prav ugao - stranica preko puta njega je hipotenuza!
Glavna formula i izvedene formule
Pitagorina teorema kaže: zbir kvadrata nad katetama jednak je kvadratu nad hipotenuzom. Formula je: a² + b² = c²
Ova formula ti daje tri mogućnosti za računanje. Kad tražiš hipotenuzu, sabiraš kvadrate kateta: c = √.
Kad tražiš katetu, situacija je drugačija. Od kvadrata hipotenuze oduzimaš kvadrat druge katete: a = √ ili b = √.
💡 Ključna razlika: Za hipotenuzu sabiraš, za katete oduzimaš!
Vizuelni dokaz teoreme
Najbolji način da razumeš zašto teorema važi je kroz vizuelni dokaz sa kvadratima. Zamisli da nad svakom stranicom trougla nacrtaš kvadrat.
Kvadrat nad katetom "a" ima površinu a², kvadrat nad katetom "b" ima površinu b². Kvadrat nad hipotenuzom "c" ima površinu c².
Teorema kaže da je površina velikog kvadrata (nad hipotenuzom) jednaka zbiru površina dva manja kvadrata. Dakle: a² + b² = c².
💡 Lakše pamćenje: Misli na površine - veliki kvadrat = dva mala kvadrata zajedno!
Rešeni primeri - katete poznate
Evo kako rešavaš zadatak kad su ti date katete a = 6cm i b = 8cm, a tražiš hipotenuzu c.
Korak po korak: napiši formulu c² = a² + b², zameni vrednosti c² = 6² + 8² = 36 + 64 = 100. Na kraju izvuci koren: c = √100 = 10cm.
Proverava: hipotenuza (10cm) je stvarno najduža stranica, što znači da si dobro računao!
💡 Savet: Uvek proveri da li je hipotenuza najduža - to je znak da si dobro rešio zadatak!
Rešeni primeri - hipotenuza i kateta poznate
Kad su ti data hipotenuza c = 13cm i kateta a = 5cm, a tražiš drugu katetu b, postupak je malo drugačiji.
Koristiš formulu b² = c² - a², što znači b² = 13² - 5² = 169 - 25 = 144. Izvuci koren: b = √144 = 12cm.
Pitagorine trojke su kombinacije brojeva koji perfektno odgovaraju teoremi, kao što su (3,4,5), (5,12,13) i (8,15,17). Kad ih zapamtiš, zadaci će ti biti mnogo lakši!
💡 Za brže rešavanje: Nauči kvadrate i korene brojeva do 25 - to će ti uštedeti dragoceno vreme na testu!
Najvažnije za test
Definicija: Zbir kvadrata nad katetama jednak je kvadratu nad hipotenuzom. Formula: a² + b² = c². Ova teorema važi samo za pravougli trougao!
Delovi trougla koje moraš znati: katete (a,b) su stranice uz prav ugao, hipotenuza (c) je najduža stranica nasuprot pravog ugla.
Tri glavne formule za test: c = √ za hipotenuzu, a = √ i b = √ za katete. Zapamti - sabiranje samo kad tražiš hipotenuzu!
💡 Pre testa: Ponovi Pitagorine trojke (3,4,5), (5,12,13), (8,15,17) i njihove umnošcke - često se pojavljuju u zadacima!
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 in Matematika
Most popular content
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
Pitagorina Teorema: Objašnjenje i Jednostavan Dokaz
Pitagorina teorema je jedna od najvažnijih matematičkih formula koju ćeš koristiti ne samo u matematici, već i u fizici i realnom životu. Ova teorema ti omogućava da izračunaš dužinu bilo koje stranice pravouglog trougla ako znaš druge dve stranice.
Pojam i dokaz Pitagorine teoreme
Pitagorina teorema je tvoj najbolji prijatelj kad god radiš sa pravouglim trouglovima! Ona ti pomaže da izračunaš dužinu jedne stranice ako znaš druge dve.
Koristi se svugde oko nas - od građevinarstva do video igara. Kad god vidiš pravi ugao, znaš da možeš primeniti ovu teoremu.
Pre nego što krenemo dalje, važno je da razumeš delove pravouglog trougla. Katete su dve kraće stranice koje se dodiruju kod pravog ugla, dok je hipotenuza najduža stranica koja se nalazi nasuprot pravog ugla.
💡 Zapamti: Uvek prvo pronađi prav ugao - stranica preko puta njega je hipotenuza!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Glavna formula i izvedene formule
Pitagorina teorema kaže: zbir kvadrata nad katetama jednak je kvadratu nad hipotenuzom. Formula je: a² + b² = c²
Ova formula ti daje tri mogućnosti za računanje. Kad tražiš hipotenuzu, sabiraš kvadrate kateta: c = √.
Kad tražiš katetu, situacija je drugačija. Od kvadrata hipotenuze oduzimaš kvadrat druge katete: a = √ ili b = √.
💡 Ključna razlika: Za hipotenuzu sabiraš, za katete oduzimaš!
Sign up to see the contentIt's free!
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Vizuelni dokaz teoreme
Najbolji način da razumeš zašto teorema važi je kroz vizuelni dokaz sa kvadratima. Zamisli da nad svakom stranicom trougla nacrtaš kvadrat.
Kvadrat nad katetom "a" ima površinu a², kvadrat nad katetom "b" ima površinu b². Kvadrat nad hipotenuzom "c" ima površinu c².
Teorema kaže da je površina velikog kvadrata (nad hipotenuzom) jednaka zbiru površina dva manja kvadrata. Dakle: a² + b² = c².
💡 Lakše pamćenje: Misli na površine - veliki kvadrat = dva mala kvadrata zajedno!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Rešeni primeri - katete poznate
Evo kako rešavaš zadatak kad su ti date katete a = 6cm i b = 8cm, a tražiš hipotenuzu c.
Korak po korak: napiši formulu c² = a² + b², zameni vrednosti c² = 6² + 8² = 36 + 64 = 100. Na kraju izvuci koren: c = √100 = 10cm.
Proverava: hipotenuza (10cm) je stvarno najduža stranica, što znači da si dobro računao!
💡 Savet: Uvek proveri da li je hipotenuza najduža - to je znak da si dobro rešio zadatak!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Rešeni primeri - hipotenuza i kateta poznate
Kad su ti data hipotenuza c = 13cm i kateta a = 5cm, a tražiš drugu katetu b, postupak je malo drugačiji.
Koristiš formulu b² = c² - a², što znači b² = 13² - 5² = 169 - 25 = 144. Izvuci koren: b = √144 = 12cm.
Pitagorine trojke su kombinacije brojeva koji perfektno odgovaraju teoremi, kao što su (3,4,5), (5,12,13) i (8,15,17). Kad ih zapamtiš, zadaci će ti biti mnogo lakši!
💡 Za brže rešavanje: Nauči kvadrate i korene brojeva do 25 - to će ti uštedeti dragoceno vreme na testu!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Najvažnije za test
Definicija: Zbir kvadrata nad katetama jednak je kvadratu nad hipotenuzom. Formula: a² + b² = c². Ova teorema važi samo za pravougli trougao!
Delovi trougla koje moraš znati: katete (a,b) su stranice uz prav ugao, hipotenuza (c) je najduža stranica nasuprot pravog ugla.
Tri glavne formule za test: c = √ za hipotenuzu, a = √ i b = √ za katete. Zapamti - sabiranje samo kad tražiš hipotenuzu!
💡 Pre testa: Ponovi Pitagorine trojke (3,4,5), (5,12,13), (8,15,17) i njihove umnošcke - često se pojavljuju u zadacima!
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.
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Most popular content in Matematika
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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