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The sum of all angles of …

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The sum of all angles of triangle is 180° ? To proff angle 1+angle 2+angle 3 =180°

    • Posted by Gagan Preet Kaur 5 years, 2 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Arpita Majumder 5 years, 2 months ago

    Given= sum of all angles of triangle is 180° To proff=angle1+angle2+angle3=180° Let the three angles be x ,2x,3x x+2x+3x=180° 6x=180° x=180°÷6 x=30° 2x=2×30=60° 3x=3×30=90° Hence, 30°+60°+90°=180° Prooved.

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