小强的爸爸准备驾车外出.启动汽车时,车载报警系统显示正前方有障碍物,此时在眼睛点
处测得汽车前端
的俯角为
,且
,若直线
与地面
相交于点
,点
到地面
的垂线段
的长度为1.6米,假设眼睛
处的水平线
与地面
平行.
![](https://img.xkw.com/dksih/QBM/2019/7/18/2249590156967936/2249700647739392/STEM/7af9270511134860ba70c71f5dc82c52.png?resizew=395)
(1)求
的长度;
(2)假如障碍物上的点
正好位于线段
的中点位置(障碍物的横截面为长方形,且线段
为此长方形前端的边),
,若小强的爸爸将汽车沿直线
后退0.6米,通过汽车的前端
点恰好看见障碍物的顶部
点(点
为点
的对应点,点
为点
的对应点),求障碍物的高度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d59142ab797807e560fe8adf63e6ecb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://img.xkw.com/dksih/QBM/2019/7/18/2249590156967936/2249700647739392/STEM/7af9270511134860ba70c71f5dc82c52.png?resizew=395)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)假如障碍物上的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186ae4baa81c268590b50e26cc0c3158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
2019·湖南株洲·中考真题 查看更多[2]
更新时间:2019-07-18 21:30:35
|
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解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,
由
绕着点
逆时针旋转90°得到,且点
恰好落在
所在直线上,
,
相交于点
.
![](https://img.xkw.com/dksih/QBM/2023/4/6/3210484386627584/3212055510220800/STEM/126bff16493f405a864157c480d815d7.png?resizew=206)
(1)若
,
,求
的面积.
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3322a2ad9a95bdc9fc576a7a158d4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2023/4/6/3210484386627584/3212055510220800/STEM/126bff16493f405a864157c480d815d7.png?resizew=206)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea909fd63f14200e05eddd45bee5cea.png)
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解答题-证明题
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适中
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【推荐2】如图,AB是⊙O的直径,D是⊙O上一点,点E时
的中点,过点A作⊙O的切线交BD的延长线于点F.连接AE并延长交BF于点C.
(1)求证:AB=BC;
(2)如果AB=10.tan∠FAC=
,求FC的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/480cb7ee71e556f7491d33c7c152de18.png)
(1)求证:AB=BC;
(2)如果AB=10.tan∠FAC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2020/4/15/2442160443047936/2442728749522944/STEM/ea41151c00a44264b89cf1834f9e1803.png?resizew=123)
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解答题-证明题
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适中
(0.65)
【推荐1】如图,在平行四边形ABCD中,DB=DA,点F是AB的中点,连接DF并延长,交CB的延长线于点E,连接AE.
![](https://img.xkw.com/dksih/QBM/2020/12/14/2613858807709696/2614918458277888/STEM/deb2994e58434c7fa81d1d9214025cb4.png?resizew=193)
(1)求证:四边形AEBD是菱形;
(2)若DC=
,tan∠DCB=2,求菱形AEBD的面积.
![](https://img.xkw.com/dksih/QBM/2020/12/14/2613858807709696/2614918458277888/STEM/deb2994e58434c7fa81d1d9214025cb4.png?resizew=193)
(1)求证:四边形AEBD是菱形;
(2)若DC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43d3987b50015d34638ded73d7585c04.png)
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解答题-问答题
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适中
(0.65)
【推荐2】如图,在平面直角坐标系xOy中,抛物线y=ax2﹣2x+c与直线y=﹣
x+3分别交于x轴、y轴上的B、C两点,抛物线的顶点为点D,联结CD交x轴于点E.
(1)求抛物线的解析式以及点D的坐标;
(2)求tan∠BCD;
(3)点P在直线BC上,若∠PEB=∠BCD,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cfa1e7ffae662aefb49a44c52d4954d.png)
(1)求抛物线的解析式以及点D的坐标;
(2)求tan∠BCD;
(3)点P在直线BC上,若∠PEB=∠BCD,求点P的坐标.
![](https://img.xkw.com/dksih/QBM/2018/5/27/1954346222526464/1957738111868928/STEM/ca302d28af864159a22115a989ab3b22.png?resizew=305)
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