Answer
173 $m^2$
Work Step by Step
Since an equilateral triangle has all equal side lengths and a triangle has 3 sides, let's assume side length s and perimeter p. In this case, p = 3s, so 60 = 3s, and s = 20.
The area of a triangle is 0.5bh, where b is the base, and h is the height. Any one of the three sides of an equilateral triangle can be considered the base, so b = 20, and h is 17.3 as given.
So, A = 0.5bh = 0.5*20*17.3 = 173 $m^2$.
