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Prove that angle a b c …

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Prove that angle a b c of a triangle is 180

Posted by Aman Kumar 7 years, 11 months ago

CBSE > Class 09 > Mathematics

2 answers

Golua Singham 7 years, 11 months ago

Make a triangle ABC with one angleABC as a ,second angleACB as b and third angleBAC as c ....................... Make a line parellel to BC passing from c...................... Now we get,angleMAB=angle a(alternate interior angle)and angleNAC=angle b(AIA)................................ Now angleMAB+angleNAC+angle c=180°(linear pair).i.e angle a +angle b+angle c=180°..........hence ,sum of the angles of a triangle is 180°.

2Thank You

Gourav Sharma 7 years, 11 months ago

If we add all three angles of a triangle then thear sum is must be 180

2Thank You

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