Question

What is the length of the hypotenuse of a right triangle with legs of 9 cm and 12 cm.

Answer 1

Use the pythagorean theorem that states : a^2 + b^2 = c^2 where a and b are the sides and c is the hypotenuse.

a^2 + b^2 = c^2
9^2 + 12^2 = c^2
81 + 144 = c^2
225 = c^2
square root of 225 = c
15 = c <-- length of hypotenuse is 15 cm.