Mathematics
Junior High
四角形ABCDで、いつでも平行四辺形になるものを全て選びなさい
ア AD//BC,AB=CD
イ AD//BC,∠A=∠C
ウ AD//BC,∠A=∠B
エ ∠A=∠B=∠C=∠D
がわかりません…。教えていただきたいです🙇♂️
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