SOLUTION: The figure below represents a semicircle with diameter AB and centre O. The radius of the semicircle is 3 cm. Taking pi to be 3.14, calculate a) the area of the shaded figure b)

Algebra ->  Circles -> SOLUTION: The figure below represents a semicircle with diameter AB and centre O. The radius of the semicircle is 3 cm. Taking pi to be 3.14, calculate a) the area of the shaded figure b)      Log On


   

Question 1042235: The figure below represents a semicircle with diameter AB and centre O. The radius of the semicircle is 3 cm. Taking pi to be 3.14, calculate
a) the area of the shaded figure
b) the perimeter of the shaded figure
Found 2 solutions by chen.aavaz, Edwin McCravy:
Answer by chen.aavaz(62) About Me  (Show Source):
You can put this solution on YOUR website!
My friend, there is no figure, so I will assume that we are talking about a semicircle and a diameter and the shaded area is the inside.
The area of the shaded figure is half of the area of the circle, that is,
A+=+%281%2F2%29%2Api%2Ar%5E2+=+%281%2F2%29%2A3.14%2A3%5E2+=+14.13
The perimeter is that of a semicircle plus the length of the diameter:
P=%281%2F2%29%2A2%2Api%2Ar%2B2%2Ar+=+3.14%2A3%2B6+=+15.42

Answer by Edwin McCravy(20059) About Me  (Show Source):
You can put this solution on YOUR website!


LOL. How do you think we could possibly know what 

part of the semicircle is shaded??????  Hahahahahaha!