OpenStudy (anonymous):

What is the arc length on a circle radius=3pi that is intercepted by a central angle of 9pi?

4 years ago
OpenStudy (anonymous):

9pi in terms of radians is the same as 1pi, which is half of a revolution. So you have a 180 degree angle, so the only arc length you have is half of the perimeter.

4 years ago
OpenStudy (anonymous):

Arc length on a circle is given as \[s=r \theta \] \[s= 3 \pi \times 9 \pi = 27 \pi^2\]

4 years ago
OpenStudy (anonymous):

thank you

4 years ago
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