How would I figure this out? I will medal, no direct answers.

Area of Circle

Find the area of a circle circumscribed about an equilateral triangle whose side is 18 inches long.

81

108

243

Question

How would I figure this out? I will medal, no direct answers.

Area of Circle

Find the area of a circle circumscribed about an equilateral triangle whose side is 18 inches long.

81

108

243

sagewilson · Answer

@Directrix do you think you can help me?

sagewilson · Answer

Formula: C = πr[^{2}\]

I'm not sure what to do....

sagewilson · Answer

*πr^2

sagewilson · Answer

Any clue on how to do this @kaitlyn_nicole ?

kaitlyn_nicole · Answer

since its circumcised about a triangle whose side is 18, 18 would also be the diameter of the circle. but you need the radius of the circle, so if the diameter is 18, what is the radius?

sagewilson · Answer

The radius would be 9. So it would be π9^2 or 81π, right?

kaitlyn_nicole · Answer

yes sir

sagewilson · Answer

:D thank you for helping me.

kaitlyn_nicole · Answer

you're welcome!