The sector of a circle has radius of 28 cm and central angle 90o. Find its perimeter? Pick one.
A) 100 cm	B) 85 cm	C) 75 cm	D) 95 cm	E) 110 cm
Perimeter of the sector = length of the arc + 2(radius)   = (90/360 * 2 * 22/7 * 21) + 2(28)   = 44 + 56= 
<gadget id="calculator">44 + 56</gadget>
<output>100</output>
100 cm   100 cmnswer: 100 cm
<result>A</result>
The sector of a circle has radius of 28 cm and central angle 90o. Find its perimeter?