Question

Point O is the center radius of larger circle is twice the radius of smaller circle and the area of the shaded region is 9pi what is the circumference of the smaller cirlce?

Answer 1

@dan815 please help

Answer 2

s'il vous plaît

Answer 3

@mth3v4

Answer 4

@Psymon @Mertsj

Answer 5

okay can u tell me how u can find the area of that shaded region first

Answer 6

the area of the shaded region is 1/3 *(area of bigger circle - area of the smaller circle)

Answer 7

lets say the radius of the smaller circle is r
and the radius of the bigger circle must be 2* r then