## anonymous one year ago What is the approximate perimeter of the figure?

1. anonymous

semicircle that is 3 cm

2. anonymous

@Phebe

3. anonymous

A. 18.8 cm B. 10.71 cm C. 7.7 cm D. 4.71 cm

4. anonymous
5. Astrophysics

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 |dw:1434059082381:dw| $P = d + d + \frac{ \pi d }{ 2 }$

6. anonymous

thank you

7. Astrophysics

8. anonymous

its 10.71 right?

9. Astrophysics

Right!

10. anonymous

yes! thank you

11. Astrophysics