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

http://lv.k12.com/mediaFiles/Ninth_Grade/Math/Unit17525/Lesson68693/VHS_PA_S2_03_L210_L310_LQ_Q2.gif is the picture.

Answer 1

@Qwertty123

Answer 2

Hello! :)
Okay so you know that...
= 2(3 + 6)
= 2(9)
= ?

Answer 3

I got 9.42 for @563blackghost 's example. And that would simplify to 9.4. And 18 for @Qwertty123 's example. So, I believe that it is A. But I'm still not completely sure.

Answer 4

Answer (1): 18 mm assuming it's a rectangle
----------------
= (12 * 2 * 22/7)/2 + 2(12)
= (528/7)/2 + 24
= 264/7 + 168/7

Answer 5

Ok, but that isn't even an answer choice so... I'm not completley sure still, sorry.

Answer 6

Answer (1): 18 mm assuming it's a rectangle
----------------
= (12 * 2 * 22/7)/2 + 2(12)
= (528/7)/2 + 24
= 264/7 + 168/7
= 432/7 or 61 5/7

Answer (2): 61 5/7 centimeters OR 61.7 1/7 centimeters...

Answer 7

Yeah, but that's not an answer choice... :/

Answer 8

I don't know...

Answer 9

sorry im late

Answer 10

@ThoriteGem

Answer 11

you would take the perimeter of the rectangle which is 18 and add half the circumference of a circle with a radius of 3 which is 9.42 so your final answer would be 18+9.42

Answer 12

so 21.42?

Answer 13

and @563blackghost it was fine

Answer 14

yeah try 21.4

Answer 15

yea try 21.4....im not really sure about that answer but you can try...