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7-73.

2 triangles, share a part of their horizontal sides, horizontal top side, F D, of triangle, F E D, extends to the right, horizontal bottom side, A C, of triangle, A B C, extends to the left. Suzette started a proof to show that if , , and , then . Examine her work below. Then complete her missing statements and reasons.

 Statements 

Reasons

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Reflexive Property

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Addition Property of Equality (adding the same amount to both sides of an equation keeps the equation true)

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Segment addition

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Copy the diagram onto your paper and mark the given information.

What kinds of congruent angles are created by parallel lines?