如图是油路管道的一部分,延伸外围的支路恰好构成一个直角三角形,两直角边分别为3m和4m..按照输油中心O到三条支路的距离相等来连接管道,则O到三条支路的管道总长(计算时视管道为线,中心O为点)是( )
![](https://img.xkw.com/dksih/QBM/2011/12/6/1573299003801600/1573299045031936/STEM/26d0fd6ee58a4dbca28571f3cdffa8cd.png?resizew=193)
![](https://img.xkw.com/dksih/QBM/2011/12/6/1573299003801600/1573299045031936/STEM/26d0fd6ee58a4dbca28571f3cdffa8cd.png?resizew=193)
A.2m | B.3m | C.4m | D.6m |
11-12八年级上·浙江杭州·期中 查看更多[2]
更新时间:2011-12-06 20:33:08
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【推荐1】如图,
中,
,
平分
,
,
,则
的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/3c8bad6a-41f7-4c93-a04d-60922fb3b758.png?resizew=244)
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A.12 | B.10 | C.15 | D.30 |
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【推荐2】如图,
中,
,利用尺规在BC,BA上分别截取BE,BD,使
.分别以D,E为圆心、以大于
的长为半径作弧,两弧在
内交于点F;作射线BF交AC于点G,若
,P为AB上一动点,则GP的最小值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/5763c522-efaa-4b0b-86ed-dc88db19ba68.png?resizew=189)
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A.![]() | B.3 | C.![]() | D.6 |
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