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OpenStudy (anonymous):
If the length of an arc is 12 inches and the radius of the circle is 10 inches, what is the measure of the arc? 216 degrees 270 degrees 288 degrees
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OpenStudy (mertsj):
Find the circumference of the circle first. What is it?
OpenStudy (anonymous):
umm. i dont know?
OpenStudy (mertsj):
Circumference = 2 pi r Find the circumference
OpenStudy (anonymous):
75.36
OpenStudy (mertsj):
Do you have a calculator?
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OpenStudy (anonymous):
just kidding
OpenStudy (anonymous):
its actually 62.8
OpenStudy (anonymous):
yes i do
OpenStudy (mertsj):
So if the arc is 12, it is this part of the circle: 12/62.8
OpenStudy (mertsj):
So the measure of the arc will be that part of the entire circle which is 360 degrees. So multiply that fraction by 360
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OpenStudy (anonymous):
i get 30/157 ?
OpenStudy (mertsj):
|dw:1391131814233:dw|
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