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在三角形ABC中,如果知道ab=ac,ad平分∠bac,那个可不可以直接用三线合一证明ad垂直于bc?
在三角形ABC中,如果知道ab=ac,ad平分∠bac,那个可不可以直接用三线合一证明ad垂直于bc?
2024-12-29 20:11:31
推荐回答(2个)
回答1:
可以,直接写 ∵ab=ac ad平分∠bac(已知)
∴ad⊥bc(等腰三角形三线合一)
回答2:
当然可以。但是如果你刚刚学三线合一的话,建议你还是不要怕烦,还是用边角边全等证明两角相等全是90度比较合适。
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