The sector of a circle has radius of 21 cm and central angle 108o. Find its perimeter?
Choose the correct choice:
A) 81.6cm	B) 85.9cm	C) 90cm	D) 92cm	E) 95cm
Perimeter of the sector = length of the arc + 2(radius)   = (108/360 * 2 * 22/7 * 21) + 2(21)   = 39.6 + 42= 
<gadget id="calculator">39.6 + 42</gadget>
<output>81.6</output>
81.6 cm   81.6cmnswer:81.6cm
<result>A</result>
The sector of a circle has radius of 21 cm and central angle 108o. Find its perimeter?