Answer:
Area of rectangle = 80
Area of Half Circle 8π
Explanation:
The area of the rectangle is width x length, so:
Area of Rectangle: 8x10=80 ft^2
Since we know that this is a rectangle, opposite sides are equal, hence the half circle's diamiter being 8 as well.
The area of a circle is πr^2 and half-circle being πr^2/2, so with radius 4 (d/2= 8/2=4)
Area of half circle= π(4)^2= 16π/2= 8π