The sector of a circle has radius of 14 cm and its perimeter 50 cm. Find its central angel?  Pick:
A) 180 o	B) 225 o	C) 270 o	D) 150 o	E) 90 o

Rationale: lte central angle = x perimeter of the sector = length of the arc + 2 ( radius ) 50 = ( x / 360 * 2 * 22 / 7 * 14 ) + 2 ( 14 ) 50 = 88 x / 360 + 28 88 x / 360 = 22 88 x = 7920 x = 90 answer : e
Answer: E