1. sector. If you draw it out, it is like a slice of a pie. When you think sector, think section.
2. A 60 degree sector is 1/6 of a circle which is 360 degrees. So the area is 1/6 * 42 = 7, so B
3. area = pi * r^2 = 3.14 * 3^2 = 28.27, which is closest to A
