JAMB - Mathematics (1994 - No. 42)
In the diagram, PQRS is a parallelogram. Find the value of < SQR
30o
50o
80o
100o
Spiegazione
SQR + RQV + VQU = 18o angle on a straight line SP is parallel to QR and PV is parallel to TR
< STP = < RQV = 30o
But SQR + 30o + 50o = 180o
SQR = 180 - 80
= 100o
< STP = < RQV = 30o
But SQR + 30o + 50o = 180o
SQR = 180 - 80
= 100o