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!
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Where can I download the Knowunity app?
You can download the app from Google Play Store and 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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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
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
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
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
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 apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
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
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
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
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
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 apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
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
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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!
Access to all documents
Improve your grades
Join milions of students
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
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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 a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
Where can I download the Knowunity app?
You can download the app from Google Play Store and 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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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
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
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
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
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 apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
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
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
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
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
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 apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user