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Multiple-Choice Questions with One or More Correct Answers ‹ 135
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 447. In the preceding figure, lines m and n are cut by a transversal t. Which of 
the following conditions by itself would ensure that lines m and n are par-
allel? Indicate all such conditions.
 (A) ∠ ≅ ∠2 4 
 (B) ∠3 and ∠4 are supplementary
 (C) ∠ ≅ ∠1 2 
 (D) ∠3 and ∠4 are right angles
 (E) ∠1 and ∠5 are supplementary
 448. Which of the following conditions for a quadrilateral would be sufficient 
by itself to prove the quadrilateral is a parallelogram? Indicate all such 
conditions.
 (A) It is equilateral.
 (B) Its diagonals are congruent and perpendicular.
 (C) It has two parallel sides.
 (D) Its diagonals bisect each other.
 (E) Each pair of consecutive angles is supplementary.
05_McCune_Ch04.indd 135 2/11/22 5:10 PM