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# In the Following Figures, O is the Centre of the Circle. Find the Values of A, B and C. - Mathematics

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#### Question

In the following figures, O is the centre of the circle. Find the values of a, b and c.

#### Solution

Here, b=1/2xx 130°

(Angle ate he centre is double the angle at the circumference subtended by the same chord)

⇒ b = 65°

Now, a + b 180°

(Opposite angles of a cyclic quadrilateral are supplementary)

⇒ a = 180°- 65°= 115°

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