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Prove the sum of angles of …

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Prove the sum of angles of a traingle is 180

    • Posted by Neha Nayyer 5 years, 4 months ago

    CBSE > Class 09 > Mathematics
    • 4 answers

    Sia ? 5 years, 4 months ago


    Let the triangle's of angle is x, y and z
    we have to prove
    x + y + z = 180 ..........(i)
    we know that sum of two interior opposite angle is equal to exterior angle.
    so,  x + y = 180 - z ....... (ii)
    By linear pair exterior angle is 180 - z when triangle's angle is z.
    By (i) also we get
    x + y = 180 - z ..........(iii)
    Hence proved
    (ii) and (iii) are the same, so we can say that the sum of the three angles triangle is 180o.

    0Thank You

    Vansh Gupta 5 years, 4 months ago

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    Aditya Raj 5 years, 4 months ago

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    0Thank You

    Neha Nayyer 5 years, 4 months ago

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    ANSWER
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