OAB5OA4的精選

問題詳情：如圖,四邊形ABCD是菱形,對角線AC與BD相交於點O,AB=5,OA=4,求BD的長.【回答】解:∵四邊形ABCD是菱形,∴OD=OB,AC⊥BD,∴在Rt△AOB中,OB===3,∴BD=2OB=6.知識點：特殊的平行四邊形題型：解答題...