waecmaths question:
In the diagram, O is the centre of the circle and PQRS is a cyclic quadrilateral. Find the value of x
Option A:
25o
Option B:
65o
Option C:
115o
Option D:
130o
waecmaths solution:
$x=\angle PSR=\angle ZQR={{65}^{\circ }}\text{ }\!\!\{\!\!\text{ opp interior }\angle \text{ of cyclic quad}=\text{ ext }\angle \text{ of the opp }\angle \text{ cyclic quad }\!\!\}\!\!\text{ }$
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