Question

Suzie made a placemat shaped like an equilateral triangle and wants to put trim around the edges. The length of one side of the placemat is 18 in.

How much trim does Suzie need?

Answer 1

Suzie needs enough trim to cover the perimeter of the triangle. So she need enough to cover each side of 18. Thus 18 x 3 = 54 and 54 is your answer.