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Circle: Example
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Circle is a plane figure bounded by a single curved line, every point of which is equally distant from the point at the center of the figure.
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Example: In the figure below, find mPQB where O is the centre of the circle.
Solution: Since angle in a semi-circle is a right angle.
CPD = 90
In CPD, we have
PCD + PDC + CPD = 180
PCD + 32+ 90 = 180
PCD = 58
Consider arc DP.
We find thatPCD andPQD are angles in the same segment of a circle.
PQD =PAD       ...[Angles in the same segment are equal]
PQD = 58
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