Question

Calculate the length of the third side

Answer 1

length of side = 9

Explanation:

This is a right angle triangle so we can use Pythagoras theorem. a^2 + b^2 = c^2

a^2 + 12^2 = 15^2

a^2 = (15^2) - (12^2)

a^2 = 225 - 144

a^2 = 81

a = square root of 81

a = 9