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Proving a Quadrilateral is a Parallelogram

Which criteria alone are sufficient to prove that a quadrilateral is a parallelogram? Hints: A parallelogram is a quadrilateral in which both pairs of opposite sides are parallel. Parallel lines have equal slopes.

該当するものを全て選択
  • A
  • B
  • C
  • D
  • E
  • F
  • G
答 (3)を確認