Common Core Geometry Practice Test

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ABCD is a parallelogram whose diagonals intersect at E. Which additional fact is sufficient to prove that ABCD is a rectangle?

AB = CD AE = EC AC = BD m∠A + m∠B = 180°

Correct Answer:

AC = BD

Explanation:

A parallelogram with congruent diagonals is a rectangle. The other listed properties are already true for every parallelogram and do not force it to be a rectangle.

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