到底什么叫平行四边形?是定义说的两组对边分别平行的四边形是平行四边形,还是判定定理说的两组对边分别相等;一组对边平行且相等;对角线互相平分;两组对角分别相等的四边形是平
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![到底什么叫平行四边形?是定义说的两组对边分别平行的四边形是平行四边形,还是判定定理说的两组对边分别相等;一组对边平行且相等;对角线互相平分;两组对角分别相等的四边形是平](/uploads/image/z/13394598-6-8.jpg?t=%E5%88%B0%E5%BA%95%E4%BB%80%E4%B9%88%E5%8F%AB%E5%B9%B3%E8%A1%8C%E5%9B%9B%E8%BE%B9%E5%BD%A2%3F%E6%98%AF%E5%AE%9A%E4%B9%89%E8%AF%B4%E7%9A%84%E4%B8%A4%E7%BB%84%E5%AF%B9%E8%BE%B9%E5%88%86%E5%88%AB%E5%B9%B3%E8%A1%8C%E7%9A%84%E5%9B%9B%E8%BE%B9%E5%BD%A2%E6%98%AF%E5%B9%B3%E8%A1%8C%E5%9B%9B%E8%BE%B9%E5%BD%A2%2C%E8%BF%98%E6%98%AF%E5%88%A4%E5%AE%9A%E5%AE%9A%E7%90%86%E8%AF%B4%E7%9A%84%E4%B8%A4%E7%BB%84%E5%AF%B9%E8%BE%B9%E5%88%86%E5%88%AB%E7%9B%B8%E7%AD%89%EF%BC%9B%E4%B8%80%E7%BB%84%E5%AF%B9%E8%BE%B9%E5%B9%B3%E8%A1%8C%E4%B8%94%E7%9B%B8%E7%AD%89%EF%BC%9B%E5%AF%B9%E8%A7%92%E7%BA%BF%E4%BA%92%E7%9B%B8%E5%B9%B3%E5%88%86%EF%BC%9B%E4%B8%A4%E7%BB%84%E5%AF%B9%E8%A7%92%E5%88%86%E5%88%AB%E7%9B%B8%E7%AD%89%E7%9A%84%E5%9B%9B%E8%BE%B9%E5%BD%A2%E6%98%AF%E5%B9%B3)
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