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两直角边为3和4的直角三角形的斜边和斜边上高线的比是( ) A.5:3 B.5:...
两直角边为3和4的直角三角形的斜边和斜边上高线的比是( )
A.5:3
B.5:4
C.5:12
D.25:12
考点分析:
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C.a=30,b=2,c=
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D.无法确定
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2与b
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A.a
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2B.ab
C.±ab
D.±a
2b
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B.a=2k,b=3k(k≠0)
C.3a=2b
D.a=
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b
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