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ZanzabumX
[31]
3 years ago
15
The circle shown has the center o and the measure of angle aob is 45. if the area of the shaded sector is 18 pi what is the radi
us of the circle
Mathematics
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answer:
laila
[671]
3 years ago
8
0
The picture in the attached figure
we know that
area of the circle=pi*r²
if 45° has an area-------> 18*pi units²
360° (full circle)----------> x
x=360*18*pi/45-----> x=144*pi units²
area of circle=pi*r²
144*pi=pi*r²------> r²=144--------> r=√144-----> r=12 units
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