Question

Using circle P with a radius of 7 cm, find the EXACT

measure/length for each of the following.
8.
9
10
11.
12
The diameter of circle P
The circumference of circle P
The area of circle P
The length of RS
The area of sector MPR
P
45
30
S
M
R

Answer 1

8. 14

9. 14π

10. 49π

11. 1.75π

12.
`(49)/(12)` π

Explanation:

If the radius is 7, the diameter is 14.

Circumference is pi * diameter, so 14π

Area is π r², so 49π

Arc length is
`(n)/(360)` * 2πr, so
`(45)/(360)` * 14π = 1.75π

Sector Area is
`(n)/(360)` * πr², so
`(30)/(360)` * 49π =
`(49)/(12)`π