Thomas needs to prove the following theorem. If one pair of opposite sides of a quadrilateral is congruent and parallel, then the quadrilateral is a parallelogram. He draws the figure below and begins his proof. B. AB DC Given: AB II DC Prove: ABCD is a parallelogram D. Statements Reasons AB DC 1. 1. Given AB | DC 2. BAC DCA 2. 7

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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What should be Thomas reason for step 2? A.if parallel lines are cut by a transversal,corresponding angles are congruent. B.if parallel lines are cut by the transversal alternate interior angles are congruent. C.congruent parts of congruent triangles are congruent. D.vertical angles are congruent .
Thomas needs to prove the following theorem.
If one pair of opposite sides of a quadrilateral is congruent and
parallel, then the quadrilateral is a parallelogram.
He draws the figure below and begins his proof.
B.
AB DC
Given:
AB II DC
Prove: ABCD is a parallelogram
D.
Statements
Reasons
AB DC
1.
1. Given
AB DC
2. BAC DCA
2. 7
Transcribed Image Text:Thomas needs to prove the following theorem. If one pair of opposite sides of a quadrilateral is congruent and parallel, then the quadrilateral is a parallelogram. He draws the figure below and begins his proof. B. AB DC Given: AB II DC Prove: ABCD is a parallelogram D. Statements Reasons AB DC 1. 1. Given AB DC 2. BAC DCA 2. 7
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