9. The perimeter of an equilateral triangle is 88.5 cm. Find each of the side. What is the area of the triangle ? in square feet? in square meters? in square inches?

Solution:

The perimeter of an equilateral triangle = 3* side

So each side = 88.5/3 = 29.5 cm

The area = sqrt(3)*29.5^2/4 = 217.56*sqrt(3) = 376.8 square cm

The area = 0.0377 square meters = 0.406 square feet = 58.44 square inches