The sector of a circle has radius of 21 cm and central angle 144o. Find its perimeter?	Choices.
A) 80cm B) 82cm C) 90cm D) 94.8cm E) 95cm
Perimeter of the sector = length of the arc + 2(radius)   = (144/360 * 2 * 22/7 * 21) + 2(21)   = 52.8 + 42= 
<gadget id="calculator">52.8 + 42</gadget>
<output>94.8</output>
94.8 cm   Answer:94.8cm
<result>D</result>
The sector of a circle has radius of 21 cm and central angle 144o. Find its perimeter?