First, you find the area of one triangle.
Area of Triangle= 1/2 base x height
here we plug in
(1/2)5 x 7
2.5 x 7
17.5
So 17.5 is the area of one triangle, you have 4
so we multiply 17.5 x 4= 70
Now we need to find the area of the base which is a square so the area = length x width or side x side
plug in 5 x 5= 25
so we add everything up 70+25= 95
Answer is choice c 95 ft sq.