The angle of a sector of a circle is 0.9 radians. If the radius of the circle is 4cm, find the length of the arc of the sector.
-
A.
3.6 cm -
B.
7.6 cm -
C.
8.0 cm -
D.
11.6 cm
Correct Answer: Option A
Explanation
Length of arc given angle in radians = (r theta)
= (4 times 0.9 = 3.6 cm)