angle A + angle B= 120° and angle B + angle C = 140°,find angle B.
AND
angle A + angle B = 100°and angle C + angle B = 40°,find angle B.
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(I) A+ B 120°+C 140°= 180°
A= 260 = 180°
A= 260°-180°
A= 120° Ans
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