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WAEC - Mathematics (2012 - No. 35)
In the diagram, O is a circle centre of the circle PQRS and < PSR = 86
o
. If < PQR = x
o
, find x
108
o
172
o
130
o
50
o
Explication
x
o
= 86 x 2(angle at centre = 2 x angle at circumference)
= 172
o
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