In diagram PQ ST and lt PQR 120o lt RST 130o fi... - JAMB Mathematics 1998 Question

In diagram, PQ || ST and < PQR = 120^o, < RST = 130^o, find the angle marked x

A

50

B

65

C

70

D

80

correct option: c

x + 60^o + 50^o = 180^o

x = 110^o = 180^o

x = 180^o - 110^o

= 70^o

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