A central angle of a circle whose radius is 8 centimeters subtends an arc whose length is? 2π/9 centimeters.
What is the radian measure of the central angle?
We have that
arc length = r * theta.....so
(2pi).9 = 8 * theta divide both sides by 8
(2pi) / ( 9 * 8) = theta
(2/72)pi = theta
pi/36 = theta (in rads)
