Question

(20) Prove that "The sum of the Angles of a triangle is 180 "
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Answer 1

Answer:

To prove this we are given a triangle PQR and Angle 1, Angle 2 and Angle 3 are the angles of triangle PQR. To prove Angle 1 + A angle 2 + Angle 3 = 180 degree, draw a line XYP parallel to QR through the opposite vertex P.

Step-by-step explanation:

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