In the diagram, O is the centre of the circle, < XOZ = (10cm...
In the diagram, O is the centre of the circle, < XOZ = (10cm)o and < XWZ = mo. Calculate the value of m.
A.
30
B.
36
C.
40
D.
72
Correct answer is A
In the diagram above, α = 2mo (angle at centre = 2 x angle at circumference)
α + 10mo = 360o (angle at circumference)
α + 10mo = 360o(angles round a point)
2mo + 10mo = 360o
12mo = 360o
mo = 360o12
= 30o
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