Question

A couple wants to install asquare mirror that has an area of 500square inches. To the nearest tenth of aninch, what length of wood trim is neededto go around the mirror?

Answer 1

We have to find the perimeter of the square:

Perimeter = side length + side length + side length + side length

First, we have to find the side length:

We have the area: 500 in2

Area of a square = s^2

Replacing with the value given:

500 = s^2

Solving for s (side length)

√500 = s

22.4 in =s

Replace the s value in the perimeter formula:

P = s+s+s+s = 22.4+22.4+22.4+22.4 = 89.6 in