SOLUTION: My grandson is working this problem((A=80cm2 then there is a circle with a 45 degree area blacked out)). He is supposed to use a proportion to find the area of each shaded sector.

Question 840371: My grandson is working this problem((A=80cm2 then there is a circle with a 45 degree area blacked out)). He is supposed to use a proportion to find the area of each shaded sector.
Answer by Edwin McCravy(20054) (Show Source): You can put this solution on YOUR website!

45 degrees is to 360 degrees as the area of the sector is to the area of the whole circle:

45�:360� = x:80cm�



360x = (80)(45)
360x = 3600
   x = 
   x = 10

The area of the sector is 10 cm�

Edwin

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