AB is minor arc in a circle with centre P. R is the point on the major arc except A and B. If ∠APB = 150, then ∠ARB = ______
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The major arc subtends angle 2x and the minor arc subtends angle x
Since the length of arcs depend upon the angle subtended at the centre
2x+x=36
o
(complete angle)
3x=120
o
×3
x=120
o
Hence major arc subtends 240
o
and minor arc subtends 120
o
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