Or

Tutorial

Proofs as in our Textbook

Source: MasterWuMathematics at YouTube: https://www.youtube.com/watch?v=In6NZCp4cNA

Ingenious and Simple!!!

Source: Zach Wissner-Gross at YouTube: https://www.youtube.com/watch?v=qznBmRIYUB4

Geometric traditional

Source: Jayme Cronquist at YouTube: https://www.youtube.com/watch?v=nt0Nfz5Lc0A

As in our Textbook

Source: Jeff O'Connell at YouTube: https://www.youtube.com/watch?v=vxlr9oiMVRs

Very ingenious Geometric Proof, it builds a special rectangle using 4 right triangles of different sizes

Source: Math Proofs at YouTube: https://www.youtube.com/watch?v=ea6-ctMYn_Q

As In our Tesxbook

Source: MasterWuMathematics at YouTube: https://www.youtube.com/watch?v=j1pPcEv1eSo

Source: turksvids at YouTube: https://www.youtube.com/watch?v=5RrN3Mb3SHc

Source: ExamSolutions at YouTube; https://www.youtube.com/watch?v=Tr8ck6qSXgc

Source: ExamSolutions at YouTube: https://www.youtube.com/watch?v=N9LLBIR18rM

Source: ExamSolutions at YouTube; https://www.youtube.com/watch?v=Z3Ky61hBEjE

Source: ExamSolutions at YouTube: https://www.youtube.com/watch?v=am_pEZZAb-s

Source: ExamSolutions at YouTube: https://www.youtube.com/watch?v=2INX2YMWiKc

Source: ExamSolutions at YouTube: https://www.youtube.com/watch?v=cAokL9gKy98