## anonymous one year ago The image below is a triangle drawn inside a circle with center O:

1. anonymous

2. anonymous

Which of the following expressions shows the area, in square inches, of the circle? (π = 3.14) 3 ⋅ 3.14 ⋅ 22 3.14 ⋅ 32 3.14 ⋅ 22 3.14 ⋅ 3

3. ♪Chibiterasu

Well we know the diameter.

4. ♪Chibiterasu

And we need the radius.

5. ♪Chibiterasu

Do you know what the radius is?

6. Plasmataco

The diameter is 6 so the radius is 3 the formula for the area of a circle is 2radius squared themes pi so three squared times pi is nine pi

7. anonymous

is the radius 4 inches?

8. anonymous

or 3 inches?

9. ♪Chibiterasu

The radius is 3 because the line going through the center is 6 inches.

10. Plasmataco

Do u see how the line with the length of six passes through the center?

11. Plasmataco

Divide it by two because the radius is half the diameter

12. Plasmataco

I'm not sure why it isn't one of the options

13. anonymous

oh OK so its none of the answer choices :/ @Plasmataco

14. Plasmataco

It should be 9 times 3.14

15. anonymous

i'll ask for help ;) @jim_thompson5910

16. Plasmataco

Ok. Don't use me as a source too much. @jim_thompson5910 is probably a better source because I'm Only 13

17. anonymous

same lol

18. Plasmataco

:3

19. anonymous

this is a review and im bad at math :b

20. jim_thompson5910

I'm guessing choice B is supposed to say $\Large 3.14 \cdot 3^2$ ? or no?

21. anonymous

yup

22. anonymous

so its b? @jim_thompson5910

23. Plasmataco

Oh yeahhhhh. It is the highest possibility

24. anonymous

OK thanks! :)

25. jim_thompson5910

yeah it's B since you use the area of a circle formula $\Large A = \pi*r^2$

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