Question

PLEASE HELP!!! 20 POINTS!! I REALLY NEED HELP ON THIS!! PLEASE IF YOU ARE TYPING PLEASE FINISH TYPING!!

Answer 1

The semicircle has diameter 18 ft, so it has radius 9 ft, and this is the height of the rectangle.

The area of the shaded region is (area of rectangle) - (area of semicircle).

The area of a circle with radius
`r` is
`\pi r^2`, so the area of a semicircle with the same radius is
`\frac\pi2r^2`, and in this case that's
`\frac{3.14}2(8\,\mathrm{ft})^2=100.48\,\mathrm{ft}^2`.

The area of the rectangle is
`(18\,\mathrm {ft})(9\,\mathrm{ft})=162\,\mathrm {ft}^2`.

Then the area of the shaded region is

`(162-100.48)\,\mathrm{ft}^2=61.52\,\mathrm{ft}^2`