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If we convert 135° to radian measure, we get
A.3π/4 B.3π/2 C.π/4 D.π/2 E.(3+π)/2

1. 75° in radian measure is
   A.π/75 B.75/π C.5π/12 D.12π/5 E.π/30
   3.An arc PQ subtends an angle 60° at the centre O of radius 3 cm. The area of the sector POQ is
   A. 270 〖cm〗^2 B. 3/2 〖cm〗^2 C. 3π/2 〖cm〗^2 D. 3π 〖cm〗^2 E. 180 〖cm〗^2
   4.A sector of a circle has arc length of 8 cm and the area of 16 cm2,then the radius of the circle
   in cm , is
   A. 2 B. 3 C.5 D. 48 E. 12
2. OAB is a sector of a circle with centre O, radius 8 cm and a perimeter 22 cm. Then the area
   of sector, in square cm is
   A. 6 B. 28 C. 24 D. 48 E. 12