The sector of a circle has radius of 18 cm and central angle 135o. Find its perimeter?	Options.
A) 78.4 cm  B) 11.5 cm  C) 91.8 cm  D) 92.5 cm  E) 99.5 cm
Perimeter of the sector = length of the arc + 2(radius)   = (135/360 * 2 * 22/7 * 18) + 2(18)   = 42.4 + 36= 
<gadget id="calculator">42.4 + 36</gadget>
<output>78.4</output>
78.4 cm   78.4 cmnswer:78.4 cm
<result>A</result>
The sector of a circle has radius of 18 cm and central angle 135o. Find its perimeter?