Question

in Fig. QR and RS are equal chords of a circle with centre 'O' if angle
ROS = 40, then find angle QRP.​

Answer 1

Answer: ∠PQR = 80°

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step-by-step explanation:

We know, the angle subtended by an arc of a circle at the centre is double the angle subtended by it at any point on the remaining part of the circle.

Hence,In given circle,

∠POR=2∠PQR

Therefore ∠POR=2×40°=80°