The sector of a circle has perimeter 83 cm and central angle 225o. Find its radius?  Choose the correct choice from the following:
A) 21 cm	B) 15 cm	C) 14 cm	D) 24 cm	E) 28 cm
Let radius = x cm   Perimeter of the sector = length of the arc + 2(radius)   83= (225/360 * 2 * 22/7 * x) + 2(x)   83= 55x/14 + 2x   83 = 83x/14   1162=83x   x = 14   Answer: 14 cm
<result>C</result>
The sector of a circle has perimeter 83 cm and central angle 225o. Find its radius?