Question

Assistance needed with a few questions.

Answer 1

http://prntscr.com/e8bk4l

Answer 2

wouldnt we have to find the perimeter of the semicircle and subtract the perimeter of the rectangle by that?

Answer 3

^ close but not quite

first you want to find the perimeter of the semicircle using the formula

P = (1/2) * 2 * pi * r where r = 9

then add the other three sides of the rectangle

Answer 4

I vote for Vocaloid's response.
1) Find the total length of the 3 straight sides.
2) Find the circumference of a circle of radius 9 m, and then divide this by 2.
3) Add together the results of (1) and (2), above, including the correct unit of measurement.