1. Consider ΔABD such that ∠ADB = 20° and C is a point on BD such that AB = AC and CD = CA. Then the measure of ∠ABC is :





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  • By: anil on 05 May 2019 01.59 am
    ∠ABD = 20°
    So , ∠CAD = 20°
    ∠ACD = 180° - 40° = 140°
    ∠ACB = 180° - 140° = 40 °
    ∠ABC = ∠ACB = 40°
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