Prove that sum of triangles is 180 degree.

1.	Prove that sum of triangles is 180 degree.
Answer» A+B+C=180° It will be proved using alternate interior anglesDraw a line passing through the uppermost pointThen u will get 3 angles whose sum will be 180* (Angles on a straight line)Name them 1,2 and 3Angle 1 will be equal to angle BAngle 3 will be equal to angle C1+2+3=180A+B+C=180Hence proved

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