pls answer this question fast
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1) <OAB = 50, Since its an isoceles triangle , Its isoceles because radius of circle remains the same.
2) <OAC = 20, Since its an isoceles triangle , Its isoceles because radius of circle remains the same.
3) < BAC = <OAB + <OAC = 50 + 20 => 70
4) <BOC = 360 - ( <BOA + <AOC )
=> 360 - [ 180 - (50 + 50) + 180 - ( 20 + 20 ) ]
=> 360 - [ 180 - 100 + 180 - 40 ]
=> 360 - [ 80 + 140 ]
=> 360 - 220
=> 140
5. <BOA = 180 - ( 50 + 50 )
=> 180 - 100
=> 80
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