Question

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

Answer 1

If ABC is a triangle then <)ABC+

<)BCA + <) CAB = 180 degrees.Draw a line and through points A and B.Draw Line b through Christmas and parallel to line a.....It is obvious that <) BCA + <) ACB+ <) BCA = 180 degrees.

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Answer 2

here is the answer...

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