In the diagram, PQRS is a parallelogram. Find the value of < SQR

Explanation

SQR + RQV + VQU = 18^o angle on a straight line SP is parallel to QR and PV is parallel to TR

< STP = < RQV = 30^o

But SQR + 30^o + 50^o = 180^o

SQR = 180 - 80

= 100^o