Factor is boof triangles because 4y-20 is 420 of em
A = 1/2(15+7+15+7)(13)
A= 1/2(44)(13)
A = 286
answer
286
The perimeter of the equilateral triangle will be 76.2 in
<u>Explanation:</u>
Altitude of an equilateral triangle, H = 22 in
Perimeter, p = ?
Let a be the side of the triangle
We know:

Perimeter = 3a
P = 3 X 25.4 in
P = 76.2 in