The sector of a circle has radius of 21 cm and central angle 135o. Find its perimeter?
Choose the most appropriate option
A) 91.5 cm
B) 92.2 cm
C) 28.9 cm
D) 29.2 cm
E) 98.2 cm
Perimeter of the sector = length of the arc + 2(radius)   = (135/360 * 2 * 22/7 * 21) + 2(21)   = 49.5 + 42= 
<gadget id="calculator">49.5 + 42</gadget>
<output>91.5</output>
91.5 cm   91.5 cmnswer:91.5 cm
<result>A</result>
The sector of a circle has radius of 21 cm and central angle 135o. Find its perimeter?