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Earlier discussion
2 older comments kept for context.
Tayo
Q1=5(alternate angles)
Q2=180-110(straight line angle
Q2=70
PQR=Q1+Q2
=50+70
=120
Oluwaseun Adeyemi
Q1 = 50(alternate angle)
Q2 = 180o - 110o (straight line angle)
Q2 = 70
PQR = Q1 + Q2
= 50o + 70o
= 120o