Question

#1: Which term describes the part of the area of a circle formed by an arc and two radii which intersect the endpoints of the arc?

A. Diameter of a circle
B. Sector of a circle
C. Area of a circle
D. Circumference of a circle
#2: What is the area of a 60 ° sector of a circle with area 42 pie m^2?
A. 21 pi m^2
B. 7 pi m^2
C. 6 pi m^2
D. 14 pi m^2
#3: What is the approximate area of a circle whose radius is 3 m long? (Use 3.14 for pi)
A. 28 m^2
B. 9 m^2
C. 19 m^2
D. 3 m^2
#4 and 5 will be next, so stick around! :-)

Answer 1

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