One very famous proof of the Pythagorean Theorem is by the Hindu mathematician Bhaskara. It

Question

is often called the Behold proof because, as the
story goes, Bhaskara drew the figure below and
offered no verbal argument other than to exclaim,
”Behold.” Use algebra to fill in the steps, explaining why this figure proves the Pythagorean Theorem.
to find image just search for "behold proof square image"

Answer 1

I like what Sal Khan did with it.

https://www.khanacademy.org/math/basic-geo/basic-geometry-pythagorean-theorem/basic-geometry-pythagorean-proofs/v/bhaskara-s-proof-of-pythagorean-theorem-avi