Question

please help! question attached in comments.

Answer 1

Do you know how to find the area of the semi-circle?

Answer 2

pi times r^2 all over 2?

Answer 3

Yes good job. Okay, so the radius is going to be 9 mm so use that in your formula and find the area..

Answer 4

81pi/2?

Answer 5

i got 127.17

Answer 6

That's correct. Now we know that the radius is just half of the diameter, so 9 + 9 = 18 right? So the length of the rectangle will be 18. Do:

18 (9) = __?__ for your area and then subtract 127.17 from it.

Answer 7

the answer i got is 34.83