Question

What is the perimeter of the figure to the nearest tenth of a millimeter?




A.
9.4 millimeters


B.


12.0 millimeters


C.
21.4 millimeters


D.
30.8 millimeters

Answer 1

@MonKiwi

Answer 2

Well, you can use KHDBDCM to transfer it to milimeters

Answer 3

KHDBDCM?

Answer 4

To find the perimeter, you find the perimeter of the square and add it to the perimeter of the semi-circle. Can you find these?

Answer 5

is 18mm the perimeter?

Answer 6

Okay so i got the answer 19.42

Answer 7

KHDBDCM. It helps you transfer them. So, were doing meters, so it would be Kilo-meters, Deca-meters,Meters,Deci-meters, Centi-meters, Mili-meters (I remember it by using King Henry Died By Drinking Chocolate Milk)

The semi circle is the same as the last one, 18.84, and the square equals 12.

18.84 + 12 = 30.84, which rounds to 30.8mm

Answer 8

Oh, its already in Milimeters, My apologies!

Answer 9

np

Answer 10

But, the radius of the circle is 6. 2 x 6 x pi /2 = 18.84.

3 + 3 + 6 = 12.

12 + 18.84 = 30.84 which rounds to 30.8