Angle in a Semicircle –
In the figure, PQ is considered as a diameter of a circle which has its center at O.
R and S are to be considered as the two points on the circle. ∠PRQ and ∠PSQ are examples of angles in a semicircle.
Property – An angle in a semicircle is to be considered as a right angle.
In the figure, ∠PRQ = ∠PSQ = 90⁰