Question

if O is the centre of the circle angle abo=50 and Angle aco=20 find the measure of angle BOC

Answer 1

Angle abo= angle bao=50
In ∆abo,sum of all angle is 180
50+50+x=180
x=80
In∆aoc, angle aco=angle cao=20
20+20+s=180
s=140
Angle boc=s+x
80+140=220

Answer 2

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