Question

prove that the sum of all angle of a triangle is 180°.​

Answer 1

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Answer 2

Step-by-step explanation:

Focusing the image,

If there is any triangle ABC then the sum of it's three angles is=angleBAC +angleACB+angleABC.

If we increase BC to BD Than,

angleACD=angleBAC+angleABC {must be}

⇨<ACD+<ACB=<BAC+<ABC+<ACB {adding <ACB both side}

⇨180°=sum of hole the angles in ABC tringle {<ACD+<ACB=180 as its linear}

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