The sector of a circle has radius of 21 cm and central angle 45o. Find its perimeter?
Choose the most appropriate option.
A) 91.5 B) 92 C) 93 D) 94 E) 58.5
Perimeter of the sector = length of the arc + 2(radius)   = (45/360 * 2 * 22/7 * 21) + 2(21)   = 58.5 cm   Answer: Option 58.5
<result>E</result>
The sector of a circle has radius of 21 cm and central angle 45o. Find its perimeter?