Pythagoras' theorem explanation 2

The following may also help you remember the Pythagoras' theorem formula.

Take the Squares example A square plus B square is C square

The sum of the squares $A+B$ are exactly the same size as square $C$

A plus B squared is C squared

The following diagram shows this more explicitly.

Only right angle triangles can be used in the three four and five triangle method

$a^2+b^2=c^2$

Proved by

They call this a three, four, five triangle and it only works with right angled triangles.