visual proof

When it comes to doing maths, a picture can be worth a thousand equations.
Don't like trigonometry? Don't worry, here are three beautiful proofs of a well-known result that make do without it.
The great thing about geometry is that you can sometimes prove things using pictures. Enjoy these three great visual proofs of Pythagoras' theorem!
Having trouble with algebra? Then try these visual proofs of two well-known algebraic identities.