Math/Trig
posted by CJ .
Find the radius of a circle with a central angle of pi/7 and a length of the intercepted arc equal to 7.7 cm. Round your answer to the nearest tenth.

L=r*aplha
alpha in radians
L=7.7
alpha=pi/7
7.7=r*(pi/7) divide with (pi/7)
r=7.7/(pi/7)
r=(7.7*7)/pi
r=53.9/3.1415926535
r=17,1569cm
r=17.2cm
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