Question

Lines and are parallel in the image below. The image will be used to prove that the sum of the measures of the interior angles of is 180°.

Which statement would be included in a proof of why ?
Angles F and H are congruent.
Angles A and G are congruent.
Angles A and H are congruent.
Angles E and C are congruent.

Answer 1

Angles A and H are congruent.

Explanation:

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Answer 2

Third choice:

Angles A and H are congruent.

Why? We use the transverses to copy the triangle angles G, G and H to the same point, where we see they add to a straight line, two right angles, 180 degrees.