## gabbyalicorn one year ago A circular plate has a diameter of 6 inches. What is the exact area of the plate? A. 36π square inches B. 6π square inches C. 9π square inches D. 3π square inches

1. gabbyalicorn

I think A

2. Owlcoffee

Well, you can calculate the area of a circle with the following formula: $A _{\circ}= \pi r^2$ So, therefore: $A_ \circ = \pi (6)^2$

3. gabbyalicorn

I got 113.04

4. Michele_Laino

the requested area is given by this formula: $A = \pi \times \frac{{{D^2}}}{4} = \pi \times \frac{{36}}{4} = ...inche{s^2}$

5. Owlcoffee

oooh, it's the diameter, read wrong :(

6. gabbyalicorn

wait so 3.14 x 36 div 4 ?

7. Michele_Laino

you don't have to multiply by 3.14, you have to write pi only

8. gabbyalicorn

but pi = 3.14

9. Michele_Laino

yes! nevertheless you have to write pi instead of 3.14

10. gabbyalicorn

okay.

11. Michele_Laino

so, what dou you get?

12. gabbyalicorn

28.26

13. Michele_Laino

I got: $A = 9 \times \pi {\kern 1pt} inche{s^2}$

14. gabbyalicorn

oh. well it still equals the same thing.

15. gabbyalicorn

brb

16. Michele_Laino

you have to divide 36 by 4 only

17. gabbyalicorn

which is 9

18. gabbyalicorn

Oh! C :D lol Yay! Thank you! ^u^

19. Michele_Laino

:)