00:01
So in this problem, we have a triangle here, right triangle, and then we have semicircles drawn on the sides of this triangle.
00:11
So they are pushed into one.
00:13
So we know that this whole diameter is two.
00:16
Each of these is one.
00:18
Same thing here.
00:20
This whole thing is two.
00:22
So we need to find the area of this shaded region, which is the area of the circles, of the half, or the half circles.
00:32
So these two on the side here are the same, so we can do those twice, and then this one just once.
00:39
So let's find the areas of these small ones here first.
00:44
So our radius is one.
00:50
The angle we know is one half.
00:53
Sorry, the angle we know is 180 over 360...