A|______|M______|c_______|B-如图所示线段AB=10厘米且AC:BC=3:2点M是线段AC的中点求线段BM的长.
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![A|______|M______|c_______|B-如图所示线段AB=10厘米且AC:BC=3:2点M是线段AC的中点求线段BM的长.](/uploads/image/z/8604487-55-7.jpg?t=A%7C______%7CM______%7Cc_______%7CB-%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%E7%BA%BF%E6%AE%B5AB%3D10%E5%8E%98%E7%B1%B3%E4%B8%94AC%3ABC%3D3%EF%BC%9A2%E7%82%B9M%E6%98%AF%E7%BA%BF%E6%AE%B5AC%E7%9A%84%E4%B8%AD%E7%82%B9%E6%B1%82%E7%BA%BF%E6%AE%B5BM%E7%9A%84%E9%95%BF.)
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A|______|M______|c_______|B-如图所示线段AB=10厘米且AC:BC=3:2点M是线段AC的中点求线段BM的长.
A|______|M______|c_______|B-如图所示线段AB=10厘米且AC:BC=3:2点M是线段AC的中点求线段BM的长.
A|______|M______|c_______|B-如图所示线段AB=10厘米且AC:BC=3:2点M是线段AC的中点求线段BM的长.
∵AC:BC=3:2
设AC=3x BC=2x
∴3x 2x=10
解得x=2
∴AC=3x=6.BC=2x=4.
∵M为AC中点
∴AM=MC=1/2AC=3
∴BM=MC BC=3 4=7
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