In the following figures, O is the centre of the circle. Find the values of a, b, c and d.
Here, ∠DAC = ∠CBD = 25°
(Angle subtended by the same chord on the circle are equal)
Again, 120°= b + 25°
(In a triangle, measure of exterior angle is equal to the sum of pair of opposite interior angles)
⇒ b = 95°
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- Chord Properties - Chords Equidistant from the Center Are Equal (Without Proof)