Calculate the value of Y in the diagram - WAEC Mathematics 1999 Question
Calculate the value of Y in the diagram
A
18o
B
42o
C
48o
D
132o
correct option: c
x = 180° - 123° = 57°
z = 180° - 105° = 75°
y = 180° - 57° - 75° = 48°
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