answer 1 st one please(note:need process or else Don,t answer
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since angle abc is the circum angle of the reflex angle of the angle AOC equal to 130 degree therefore we know that
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Take a point D on circumference
Join A and C to D
ADC=130/2 = 65° {angle at circumference = 1/2 angle at centre
ADCB is a cyclic quadrilateral
Angle B = 180-65 = 115°
Join A and C to D
ADC=130/2 = 65° {angle at circumference = 1/2 angle at centre
ADCB is a cyclic quadrilateral
Angle B = 180-65 = 115°
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