3 years ago

If the radius of a circle is 10 feet, how long is the arc subtended by an angle measuring 81°?

1 answer:

mihalych1998 [28]3 years ago

4 0

Circumference of entire circle = 2 * PI * 10
circumference of entire circle = 62.832 feet
81 degrees is (9/40) of a circle
62.832 * (9/40) = 14.1372 

Source:
http://www.1728.org/radians.htm

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