in the diagram angle 20o is subtended at the ce... - WAEC Mathematics 2009 Question
in the diagram, angle 20o is subtended at the centre of the circle, find the value of x
A
30o
B
50o
C
80o
D
100o
correct option: b
2(30 + x) = 360 - 200
60 + 2x = 160
2x = 160 - 60
2x = 100
x = \(\frac{100}{2}\)
x = 50
60 + 2x = 160
2x = 160 - 60
2x = 100
x = \(\frac{100}{2}\)
x = 50
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