Question

The perimeter of the triangle below is 80 units. Find the length of side PR

Answer 1

32

Explanation:

The perimeter is equal to sum of side lengths

4x + z + 3 + 5z - 3 = 80 add like terms

10z = 80 divide both sides by 10

z = 8 PR is 4z so 8*4 = 32