Answer:
69.5ft²
Explanation:
The shaded area is right triangles,
The formula for area of a right triangle is 1/2 x base x height
Triangle on right
Base: 7.6ft
Height: 10ft
Plug in: 1/2 x base x height = 1/2 x 7.6ft x 10ft = 38
Triangle on left
Base: 6.3ft
Height: 10ft
Plug in: 1/2 x base x height = 1/2 x 6.3ft x 10ft = 31.5
Add both for total shaded area: 31.5 + 38 = 69.5ft²