A rectangle is placed around a semicircle as shown below. The length of the rectangle is
4yd
.
Find the area of the shaded region. Use the value
3.14
for
π
, and do not round your answer. Be sure to include the correct unit in your answer.
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OpenStudy (anonymous):
|dw:1411786037780:dw|
OpenStudy (anonymous):
fan and medal
hartnn (hartnn):
can you find the diameter of that semi-circle ?
OpenStudy (anonymous):
they want me to find the area
OpenStudy (anonymous):
@hartnn
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hartnn (hartnn):
Area of shaded region = Area of rectangle - Area of semi circle
so, to get area of semi circle, you will need diameter or radius
OpenStudy (anonymous):
so is it SA=360-AS
OpenStudy (anonymous):
to find the area of the semi circle do I use π r²
OpenStudy (anonymous):
pi r^2
hartnn (hartnn):
yes
thats correct, but you need 'r'
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OpenStudy (anonymous):
the did not give me the radius of the circle so do I use 4
OpenStudy (anonymous):
and make it into 2
hartnn (hartnn):
|dw:1411775908090:dw|
oh and Area of semi-circle is HALF of the area of circle