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Prove that sum of all of …

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Prove that sum of all of interiors angle of triangle is 180°

    • Posted by Daljit Singh 4 years, 10 months ago

    CBSE > Class 09 > Mathematics
    • 2 answers

    Divanshu Kansal 4 years, 10 months ago

    In ∆ ABC, const. a line PQ through point A and parllel to BC. Then angle PAB + angle A + angle QAC=180° BUT angle PAB=angle B and Angle QAC=angle C [ alternative int. angle] SO, angle B + angle A + angle C = 180°

    0Thank You

    Bhoomi Mutnale 4 years, 10 months ago

    ∆ABC angle A +angle B +angle C =180° (angle sum property of a triangle)

    1Thank You

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