Question

What is the approximate perimeter of the figure?

Answer 1

semicircle that is 3 cm

Answer 2

@Phebe

Answer 3

A.
18.8 cm

B.
10.71 cm

C.
7.7 cm

D.
4.71 cm

Answer 4

http://static.k12.com/calms_media/media/1419000_1419500/1419363/1/cd4644381e9b33557ea6bb729d530654c755025f/MS_PA_130922_171134.jpg

Answer 5

Ok so when we have a full circle we use \[P = \pi d\]
But since we are looking for only a quarter of a circle we multiply by 1/4 but that is of just the red part in the drawing we need to include the diamter of the green parts as well so we have \[P = d + d + \frac{ \pi d }{ 2 }\]