Question

Plz Help!
What is the exact area of a circle whose diameter is 24 cm?

Answer 1

So Rayne, if the area of a circle is given by: \[\pi r^{2}\] and we know the diameter is 2r. Can you work out its area now?

Answer 2

OK give me one min.

Answer 3

Sure, take your time.

Answer 4

I can get it

Answer 5

So what is the answer?

Answer 6

i ment cant

Answer 7

I think i am over thinking it

Answer 8

So remember the formula is \[\pi r^{2}\], and we know that d = 24cm.
We also know that d = 2r.

Solving for r, r = d/2. 24/2 = 12cm. Therefore, r = 12cm, correct?

Now, plug that into the equation \[\pi r^{2}\]

\[\pi * 12^{2} = ?\]

Answer 9

Oh I know what I am doing wrong I was doing 24 instead of 12 oops now I maybe I can do it. lol

Answer 10

114

Answer 11

right?

Answer 12

Unfortunately not. So, what is 12 * 12?