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19 May, 23:11

Which of the following are necessary when proving that opposite sides of a parallelogram are congruent?. A) corresponding parts of similar triangles are similar. B) alternate interior angles are congruent. C) alternate interior angles are supplementary. D) corresponding parts of congruent triangles are congruent

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  1. 19 May, 23:26
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    The answer is letter D. The congruent triangles are congruent.

    A parallelogram is congruent if the corresponding angles are congruent and they form a common triangle. A parallelogram is also congruent if the sides are parallel to each other and can be divided into two common triangles.
  2. 20 May, 00:53
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    The Answers are B and D

    Alternate interior angles are congruent

    Corresponding parts of congruent triangles are congruent
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