In the figure, O is the centre of the corcle and `OABC` is rectangle :

In the picture below, O is the center of the circle and OABC is a rectangle OA =8c.m OC =15cm. Find the area of the shaded portion of the circle.

In Figure, O is the centre of the circle. Find /_B A C

In Figure,O is the centre of the circle.Find /_BAC

In Figure,O is the centre of the circle.Find /_CBD

In the figure, O is the centre of a circle and AT is a tangent at point A. The measure of angle BAT is:

In the figure below,O is the centre of the circleand OABC is a square.P and Q are the midpointsof OC and OA respectively.The area of the square(in cm^(2)), if the area of the shaded part is 38.5cm^(2) is

In the figure, O is the centre of the circle and angleACB=40^(@) then angleAOB = . . . . . . . . . .