## Mathrocks4me The pizza has a diameter of 12 inches. What is the closest to the area of the pizza? a. 432 square inches b. 168 square inches c. 108 square inches d. 72 square inches one year ago one year ago

1. Wired

Area of a circle = pi*r^2, 2r = diameter

2. danny_dumond

2*3.14*6

3. danny_dumond

ohhh yup ur right

4. danny_dumond

2pi r

5. Wired

@danny_dumond You posted the formula for the circumference, not the area.

6. Mathrocks4me

Cool. I keep forgetting to multiply by 2....thanks guys. C=pi*d Area of a circle=A=pi*r^2

7. danny_dumond

yes i just realized sorry

8. Wired

2r = diameter r = (diameter/2) $\pi*(\frac{diameter}{2})^{2} =$

9. Mathrocks4me

Did you get 113.04?

10. Wired

Yep. If you use 3 as pi you'll get 108.

11. Mathrocks4me

Thanks!!!

12. Wired

No problemo