How does the Pythagorean Theorem work?

Answer 1

The Pythagorean Theorem explains (or permits calculation of) the length of one side of a right triangle if the lengths of the other two sides are known.

A right triangle is a triangle in which one of the three angles is a right angle (i.e. it has 90 degrees)

For that kind of triangle, if

A = the length of one of the sides making the right angle,

B = the length of the other side making the right triangle, and

C = the length of the side opposite to the right angle (also called the hypotenuse,

then C2 = A2 + B2