Answer:
4957.56
Explanation:
Call the 3 sides of the triangle as a,b,c.
We have : a + b + c = 321
Since it's an equilateral triangle, a=b=c
=> a = b = c = 321/3 = 107ft.
To calculate an area of an equilateral triangle, we can use the formula :
/4 x
=> A =
/4 x
= approx. 4957.56