Question

Write the equation of the circle whose center is at the origin and whose diameter is 12.

Answer 1

Well, do it! What's your best guess?

Answer 2

D = Pi R(sqd)
12 = Pi (6^2)
12 = Pi (36)
12/36 = Pi
1/3 = Pi

Answer 3

?? @nfgallimore What?

Diameter is 12. What is the Radius?

Answer 4

diameter is 12, so radius would be 6 right? So maybe x^2+y^2=blank, I know it is less than 4 but more than three I think.

Answer 5

You have it. "blank" is \(r^{2} = 36\)

Answer 6

so how would this formula work out though? Would it come out like x^2+y^2=36?

Answer 7

That's it!! Why do you doubt?

Answer 8

haha, because I'm not the best at geometry xD thank you!!

Answer 9

Well, there you go. Now you're a little bit better. Hang in there!