请在下列两个小题中任选一个作答.如果多做,则按第(1)小题计分.
中,
,
,求
及
的值;
(2)画出如图所示几何体的三视图.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4123dd2be67e7febc50d83eee589e657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0495697431e7e73287d10a0fbcb45275.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2acc3d97d68adaa0869cb814b5d76337.png)
(2)画出如图所示几何体的三视图.
2024·陕西·模拟预测 查看更多[1]
更新时间:2024-05-06 10:16:26
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解答题-计算题
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适中
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【推荐1】知识小提示:要想使人安全地攀上斜靠在墙面上的梯子的顶端,梯子与地面所成的角
一般要满足
.如图,现有一架长
的梯子
斜靠在一竖直的墙
上.(参考数据:
,
)
(1)当人安全使用这架梯子时,求梯子底端
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距离(即
)的最小值;
(2)当梯子顶端
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(1)当人安全使用这架梯子时,求梯子底端
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
(2)当梯子顶端
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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
中,
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(2)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
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求:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3281279fd172040eadc139ee61581a5a.png)
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解答题-作图题
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适中
(0.65)
【推荐1】 如图,在平面直角坐标系中,已知点B(4,2),BA⊥x轴于A.
![](https://img.xkw.com/dksih/QBM/2014/12/26/1573778665062400/1573778671493120/STEM/05f05848263d4f46bd8f17140aedcf2c.png)
(1)求tan∠BOA的值;
(2)在坐标系中作出将△AOB绕原点O逆时针方向旋转90°后的△COD(点A的对应点是C点,点B的对应点D点),并写出C点、D点的坐标;
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![](https://img.xkw.com/dksih/QBM/2014/12/26/1573778665062400/1573778671493120/STEM/05f05848263d4f46bd8f17140aedcf2c.png)
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(2)在坐标系中作出将△AOB绕原点O逆时针方向旋转90°后的△COD(点A的对应点是C点,点B的对应点D点),并写出C点、D点的坐标;
(3)将△OAB平移得到△O′A′B′,点A的对应点是A′,点B的对应点B′的坐标为(2,-2),在坐标系中作出△O′A′B′,并求出平移的距离.
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,已知
为
的直径,线段
是
的弦且
,
与
相切于点
,
为直径,连接
,
.
![](https://img.xkw.com/dksih/QBM/2020/5/14/2462538749714432/2463787139760128/STEM/f2cfc41f71ec447cb51471db927e1fca.png?resizew=236)
(1)求证:
与
相切;
(2)求证:
;
(3)若
,
,求
的值和线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb55fbd55d6f2bf7959f382d140d5a20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
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![](https://img.xkw.com/dksih/QBM/2020/5/14/2462538749714432/2463787139760128/STEM/f2cfc41f71ec447cb51471db927e1fca.png?resizew=236)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107293cc23036361043fabee1bf2c3a0.png)
(3)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b5b4273bf0a62756ad71b526985837b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
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解答题-问答题
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适中
(0.65)
【推荐1】如图,在▱ABCD中,对角线AC、BD相交成的锐角为60°,若AC=6,BD=8,求▱ABCD的面积.(
,结果精确到0.1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6811cd554f1c68fe54f85482e3526a8.png)
![](https://img.xkw.com/dksih/QBM/2019/1/3/2110944316661760/2111424869785600/STEM/a4aa59b083a544519c6318b944848b59.png?resizew=100)
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解答题-问答题
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真题
【推荐2】如图,PA,PB分别切⊙O于点A,B,连结PO,AB相交于点D,C是⊙O上一点,∠C=60°.
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![](https://img.xkw.com/dksih/QBM/2012/7/29/1573471729795072/1573471785672704/STEM/1c6f80eca35e4d9ebcab6ffd9ef80483.png?resizew=195)
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解答题-作图题
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适中
(0.65)
【推荐1】如图是一个长方体截成的几何体,请画出这个几何体的三视图.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/5/bac08565-a2c4-463c-acaf-486aa125c674.png?resizew=108)
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