SOLUTION: Find the radius of a circle which has a sector area of 9 pi whose central angle is 90 degrees.

Question 1115207: Find the radius of a circle which has a sector area of 9 pi whose central angle is 90 degrees.
Found 2 solutions by Alan3354, stanbon:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Find the radius of a circle which has a sector area of 9 pi whose central angle is 90 degrees.
----------
360/90 = 4
Total area = 4 times that of the sector.

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Find the radius of a circle which has a sector area of 9 pi whose central angle is 90 degrees.
---
A 90 deg sector has 1/4 the area of the circle.
Total circle area = 4*9pi = 36pi
Equation:
pi*r^2 = 36pi
radius = 6
--------------
Cheers,
Stan H.
----------
RELATED QUESTIONS
find the area of a sector of a circle, given the radius is 46mm and whose central angle... (answered by Cromlix)
Find the area of a sector of a circle whose diameter is 10 cm and whose central angle is... (answered by Fombitz)
In a circle whose radius is 16, find the area of the sector whose central angle measures... (answered by Gogonati)
The area of a sector of a circle with the radius 7cm is 15 square cm. Find the measure of (answered by Theo)
the area of a sector of a circle with radius 7 cm is 15 square cm .find the measure of... (answered by ankor@dixie-net.com)
A sector of a circle has a central angle of 60�. Find the area of the sector if the... (answered by ikleyn,josgarithmetic)
in a circle with a radius of 6 cm. what is the area of a sector whose central angle is 90 (answered by stanbon)
what is the area of a sector of a circle whose central angle measures 45 degrees? the... (answered by Earlsdon)
A sector of a circle has a central angle of 50 degrees and an area of 650 cm^2. Find the... (answered by mananth)