Answer: Choice 4
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Explanation:
In figure 4, the tickmarks indicate which sides are the same length. The sides that overlap, or share a common side, are also congruent to one another. So we have three pairs of congruent sides for figure 4, and that allows us to use SSS to prove the triangles congruent.
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Side notes:
Choice 1 uses ASA
Choice 2 uses ASA
Choice 3 uses SAS
