WAEC - Mathematics (2005 - No. 18)

In the diagram, PQRS is a parallelogram and ∠QRT = 30^o. Find x

95^o

100^o

120^o

150^o

Since ∠QRS = 180^o - 30^o = 150^o and ∠SPQ = ∠QRS (theorem opp. angles in a parallelogram are equal) ∴ x = 150^o