Answer:
4957.56
Step-by-step 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 :
[tex]\sqrt{3}\\[/tex]/4 x [tex]a^{2}[/tex]
=> A = [tex]\sqrt{3}\\[/tex]/4 x [tex]107^{2}[/tex] = approx. 4957.56
