Question

Just double checking my answer on this one.

http://gyazo.com/5fe5c5d4c0700ca818454506745efabb

Answer 1

@Directrix

Answer 2

I think it's B.

Answer 3

I marked the diagram.

Answer 4

The first thing to do is to find what part of the circle the sector represents.
A sector is bounded by two radii of the circle together with the arc of its central angle.

Answer 5

30 degree sector and 360 degrees in the circle.

So, what does 30/360 simplify to?

Answer 6

Leave it as a fraction after you simplify.

Answer 7

1/12

Answer 8

Good.

Now, we need to get another part ready. The sector is 1/12 of the circle.

We need the area of the circle. So what is the area of a circle with radius 15.

No decimals and leave answer in terms of pi.

Answer 9

Isn't it 225?

Answer 10

Or wait..no
It would be 30?

Answer 11

yes, but don't forget the pi.

Answer 12

Oh so 225pi.

Answer 13

30 --> you're thinking circumference.

Answer 14

Here goes: