This document discusses the Pythagorean theorem, which states that for any right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides. It then provides an example problem where the sides of a right triangle with lengths 4 and 3 are given, and the Pythagorean theorem is used to calculate the length of the hypotenuse as 5.

1. a
c
b
right angle/ perpendicular/ 900 angle
hypotenuse
The longest side opposite to the right angle

2. a
c
b
a2+ b2 = c2

3. a =4
c = ?b =3
42+ 32 = c2
25= c2
c = 5
a2+ b2 = c2
Example: