Question on: WAEC Mathematics - 2009
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
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Correct Option: B
2(30 + x) = 360 - 200
60 + 2x = 160
2x = 160 - 60
2x = 100
x = (\frac{100}{2})
x = 50
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