The sector of a circle has radius of 20 cm and central angle 135o. Find its perimeter?	Pick
A) 91.5  B) 87.1  C) 91.7  D) 91.3  E) 91.1
Perimeter of the sector = length of the arc + 2(radius)   = (135/360 * 2 * 22/7 * 20) + 2(20)   = 47.1 + 40= 
<gadget id="calculator">47.1 + 40</gadget>
<output>87.1</output>
87.1 cm   Answer:87.1
<result>B</result>
The sector of a circle has radius of 20 cm and central angle 135o. Find its perimeter?