Piramida je jedno od najvažnijih geometrijskih tela koje ćeš često... Show more
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Updated Mar 25, 2026
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Sve o Piramidama: Površina, Zapremina i Elementi
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Osnove piramide - elementi koje moraš da znaš
Svaka piramida se sastoji od nekoliko ključnih delova koje moraš da prepoznaš odmah. Baza (B) je mnogougao na dnu koji može biti trougao, četvorougao ili bilo koji drugi pravilan oblik. Vrh (T) je tačka gde se spajaju sve bočne strane.
Osnovna ivica (a) je stranica baze, dok je bočna ivica (s) linija koja spaja vrh sa uglom baze. Kod pravilnih piramida, sve bočne ivice su jednake dužine.
Najvažnije su ti visina piramide (H) - to je najkraće rastojanje od vrha do baze, i apotema (h) - visina bočne strane. Pazi da ne mešaš ove dve!
💡 Zapamti: Visina H ide u centar baze, apotema h je visina bočnog trougla. Nisu isto!
Pravilne piramide - formule za površinu i zapreminu
U devetom razredu radiš uglavnom sa pravilnim piramidama. Kod njih je baza pravilan mnogougao (kvadrat, jednakostranični trougao, pravilan šestougao), a visina pada tačno u centar baze.
Za površinu koristi formulu P = B + M, gde je B površina baze, a M površina omotača (zbir svih bočnih strana). Površinu baze računaš prema obliku mnogougla.
Zapremina se uvek računa kao V = ⅓ × B × H - jedna trećina proizvoda površine baze i visine. Ovo je glavna razlika u odnosu na prizmu!
💡 Savršen trik: Zapremina piramide je uvek trećina zapremine prizme iste baze i visine.
Pitagorina teorema - tvoj najbolji prijatelj
Pitagorina teorema je ključ za rešavanje svih težih zadataka sa piramidama. Postoje tri karakteristična pravougla trougla koje moraš da prepoznaš.
Prvi trougao povezuje h² = H² + rᵤ² (visinu piramide, apotemu i poluprečnik upisane kružnice). Drugi daje vezu s² = H² + R₀² (visinu, bočnu ivicu i poluprečnik opisane kružnice).
Treći trougao pokazuje s² = h² + ² - povezuje apotemu, bočnu ivicu i polovinu osnovne ivice. Za najčešće baze pamti: kvadrat ima B = a², rᵤ = a/2; jednakostranični trougao B = a²√3/4, rᵤ = a√3/6.
💡 Zlatno pravilo: Uvek nacrtaj skicu i označi elemente - tako ćeš lakše prepoznati koji trougao trebaš!
Rešeni primer - četvorostrana piramida
Imaš pravilnu četvorostranu piramidu sa osnovnom ivicom a = 10 cm i visinom H = 12 cm. Treba da nađeš površinu i zapreminu.
Počni sa bazom: B = a² = 10² = 100 cm². Zapremina je laka jer imaš H: V = ⅓ × B × H = ⅓ × 100 × 12 = 400 cm³.
Za površinu ti treba omotač, a za to potrebna apotema. Kod kvadrata je rᵤ = a/2 = 5 cm. Pomoću Pitagore: h² = H² + rᵤ² = 144 + 25 = 169, dakle h = 13 cm.
Omotač ima 4 jednaka trougla: M = 4 × (a × h)/2 = 2 × 10 × 13 = 260 cm². Konačna površina: P = B + M = 100 + 260 = 360 cm².
💡 Pro savet: Uvek proveri da li ti trebaju svi elementi pre početka računanja!
Rešeni primer - šestostrana piramida i važni saveti
Pravilna šestostrana piramida sa osnovnom ivicom a = 6 cm i bočnom ivicom s = 10 cm. Cilj je zapremina.
Baza je pravilan šestougao: B = 6 × (a²√3)/4 = 54√3 cm². Za visinu koristiš vezu s² = H² + R₀², gde je za šestougao R₀ = a = 6 cm. Dakle: 100 = H² + 36, pa je H = 8 cm.
Najčešće greške koje praviš: mešanje visine piramide (H) i apoteme (h), zaboravljanje Pitagorine teoreme, nepoznavanje formula za baze.
Ključne formule za kontrolni: P = B + M, V = ⅓BH, tri Pitagorina trougla, i formule za kvadrat, jednakostranični trougao i pravilan šestougao.
💡 Za odličnu ocenu: Nauči napamet formule za poluprečnike - bez njih ne možeš ni da počneš zadatak!
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Stefan S
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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
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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
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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
Sve o Piramidama: Površina, Zapremina i Elementi
Piramida je jedno od najvažnijih geometrijskih tela koje ćeš često susretati na testovima. Ovo je poliedar koji ima jednu osnovnu površinu (bazu) i trouglaste bočne strane koje se spajaju u jednoj tački - vrhu piramide.
Osnove piramide - elementi koje moraš da znaš
Svaka piramida se sastoji od nekoliko ključnih delova koje moraš da prepoznaš odmah. Baza (B) je mnogougao na dnu koji može biti trougao, četvorougao ili bilo koji drugi pravilan oblik. Vrh (T) je tačka gde se spajaju sve bočne strane.
Osnovna ivica (a) je stranica baze, dok je bočna ivica (s) linija koja spaja vrh sa uglom baze. Kod pravilnih piramida, sve bočne ivice su jednake dužine.
Najvažnije su ti visina piramide (H) - to je najkraće rastojanje od vrha do baze, i apotema (h) - visina bočne strane. Pazi da ne mešaš ove dve!
💡 Zapamti: Visina H ide u centar baze, apotema h je visina bočnog trougla. Nisu isto!
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Pravilne piramide - formule za površinu i zapreminu
U devetom razredu radiš uglavnom sa pravilnim piramidama. Kod njih je baza pravilan mnogougao (kvadrat, jednakostranični trougao, pravilan šestougao), a visina pada tačno u centar baze.
Za površinu koristi formulu P = B + M, gde je B površina baze, a M površina omotača (zbir svih bočnih strana). Površinu baze računaš prema obliku mnogougla.
Zapremina se uvek računa kao V = ⅓ × B × H - jedna trećina proizvoda površine baze i visine. Ovo je glavna razlika u odnosu na prizmu!
💡 Savršen trik: Zapremina piramide je uvek trećina zapremine prizme iste baze i visine.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
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Pitagorina teorema - tvoj najbolji prijatelj
Pitagorina teorema je ključ za rešavanje svih težih zadataka sa piramidama. Postoje tri karakteristična pravougla trougla koje moraš da prepoznaš.
Prvi trougao povezuje h² = H² + rᵤ² (visinu piramide, apotemu i poluprečnik upisane kružnice). Drugi daje vezu s² = H² + R₀² (visinu, bočnu ivicu i poluprečnik opisane kružnice).
Treći trougao pokazuje s² = h² + ² - povezuje apotemu, bočnu ivicu i polovinu osnovne ivice. Za najčešće baze pamti: kvadrat ima B = a², rᵤ = a/2; jednakostranični trougao B = a²√3/4, rᵤ = a√3/6.
💡 Zlatno pravilo: Uvek nacrtaj skicu i označi elemente - tako ćeš lakše prepoznati koji trougao trebaš!
Sign up to see the contentIt's free!
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Rešeni primer - četvorostrana piramida
Imaš pravilnu četvorostranu piramidu sa osnovnom ivicom a = 10 cm i visinom H = 12 cm. Treba da nađeš površinu i zapreminu.
Počni sa bazom: B = a² = 10² = 100 cm². Zapremina je laka jer imaš H: V = ⅓ × B × H = ⅓ × 100 × 12 = 400 cm³.
Za površinu ti treba omotač, a za to potrebna apotema. Kod kvadrata je rᵤ = a/2 = 5 cm. Pomoću Pitagore: h² = H² + rᵤ² = 144 + 25 = 169, dakle h = 13 cm.
Omotač ima 4 jednaka trougla: M = 4 × (a × h)/2 = 2 × 10 × 13 = 260 cm². Konačna površina: P = B + M = 100 + 260 = 360 cm².
💡 Pro savet: Uvek proveri da li ti trebaju svi elementi pre početka računanja!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Rešeni primer - šestostrana piramida i važni saveti
Pravilna šestostrana piramida sa osnovnom ivicom a = 6 cm i bočnom ivicom s = 10 cm. Cilj je zapremina.
Baza je pravilan šestougao: B = 6 × (a²√3)/4 = 54√3 cm². Za visinu koristiš vezu s² = H² + R₀², gde je za šestougao R₀ = a = 6 cm. Dakle: 100 = H² + 36, pa je H = 8 cm.
Najčešće greške koje praviš: mešanje visine piramide (H) i apoteme (h), zaboravljanje Pitagorine teoreme, nepoznavanje formula za baze.
Ključne formule za kontrolni: P = B + M, V = ⅓BH, tri Pitagorina trougla, i formule za kvadrat, jednakostranični trougao i pravilan šestougao.
💡 Za odličnu ocenu: Nauči napamet formule za poluprečnike - bez njih ne možeš ni da počneš zadatak!
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 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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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