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Mathematics 11 Online
OpenStudy (quickthing):

10. The figure below shows circle P and circle Q. What is the area of the shaded region in terms of  pi ? PQ, QR, and RS are each 3 units long.

OpenStudy (quickthing):

@icecreamman

OpenStudy (quickthing):

@icecreamman

OpenStudy (anonymous):

ok so

OpenStudy (quickthing):

there's a bunch of random people here

OpenStudy (quickthing):

lol.

OpenStudy (quickthing):

they all left.... o_o

OpenStudy (anonymous):

ik that was really fast lol

OpenStudy (quickthing):

one is back.

OpenStudy (quickthing):

hi, random person *waves(

OpenStudy (quickthing):

oh, i forgot the circle... see cosketch

OpenStudy (anonymous):

What is the radius of the smaller circle? 3 units What is the radius of the bigger circle? 9 units Therefore, the area of the smaller circle is A = π(3)² = 9π The area of the bigger circle is A = π(9)² = 81π To find the area of the shaded region, just subtract the area of the smaller circle from the larger circle.

OpenStudy (quickthing):

Thank you, O Icecreamness.

OpenStudy (anonymous):

;)

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