Question

Find the Perimeter of the figure below, composed of a rectangle and a semicircle. Round to the

nearest tenths place.

Answer 1

38.6 units

Explanation:

first, we note that the diameter of the semicircle is 8 so the radius is 4. then, we find the circumference of the semicircle which is essentially half the circumference of a circle with radius 4.

this would be:

`(2 * \pi * 4) / 2 = 4\pi`

next, we add the other sides here, being 8, 9, and 9.

therefore, we get

`4\pi + 8 + 9 + 9 \approx 38.6`

so, our answer is 38.6, rounded off to the tenths place.