Question

Write and prove angle sum property Theorem​

Answer 1

Answer:

x+x+x=180degree

Step-by-step explanation:

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Answer 2

Answer:

Theorem 1: Angle sum property of triangle states that the sum of interior angles of a triangle is 180°. Proof: ... To prove the above property of triangles, draw a line \overleftrightarrow {PQ} parallel to the side BC of the given triangle