00:01
Alright, so here we have a pizza.
00:03
It has a 12 inch diameter, which means that it has a 6 inch radius.
00:10
The radius is just half the diameter.
00:12
And we are looking at a piece right here, a sector, that has an angle in the middle, that central angle of 31 degrees.
00:23
And we want to know the area of that piece, the area of the sector.
00:26
The way that i always do these is i create a proportion, and the proportion is always set up where on one side we have the area, and on the other side of our equal side we have the degree.
00:43
And on both sides, to make it a proportion, we have to have fractions, and the fractions are always going to be the part, or the sector, over the whole, or the whole circle.
00:53
So for the degree, the part that goes with the sector is that 31 degrees.
00:58
That's the angle in just that part of the circle we're looking at.
01:02
The bottom part is the degree in the whole circle.
01:06
Degree in the whole circle is 360.
01:09
And then for area, area of the sector is what we're trying to find.
01:14
I'm going to go ahead and just call that a, since we don't know it and we're trying to find it.
01:18
We also need area of the whole circle...