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If A and B are two points of a circle of...

If A and B are two points of a circle of radius r with centre at the point O and `angleAOB = theta` (in radians) then the area of the sector AOB is

A

`2 pi r`

B

`pi r^(2)`

C

`(1)/(2) r^(2) theta`

D

`r theta`

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