1 . 如图,三棱台
中,
是边长为2的等边三角形,四边形
是等腰梯形,且
,
为
的中点.
;
(2)若过
三点的平面截三棱台
所得的截面面积为
.当二面角![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbf41a3fcbd83bb806c9c4cbec8e36d2.png)
为锐二面角时,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f856c50b63de74c8e85c608e9dcc0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
(2)若过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb7ca1a5419f8a52b3141b0bc7b47dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d3eb19246fe0299ae396fc9a7e1ee6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbf41a3fcbd83bb806c9c4cbec8e36d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e07eba786740939ce0ec951572b02f0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047b9fd4020265766074c80a7f8ad3a0.png)
您最近一年使用:0次
解题方法
2 . 在正三棱台
中,
,
,
为
中点,
在
上,
.
与平面
的交点
,并写出
与
的比值(在图中保留作图痕迹,不必写出画法和理由);
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/746f45e7063b18c535a713199a54037d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d60f25ea30ee528502241850c097b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9399c9a2a31b0e3165aea2d6ccc4f7c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b99738c0ba6ad5af08c609bd57fbc015.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2023-08-02更新
|
1371次组卷
|
6卷引用:辽宁省大连市2022-2023学年高一下学期期末数学试题
辽宁省大连市2022-2023学年高一下学期期末数学试题广东省阳江市2024届高三上学期开学适应性考试数学试题(已下线)重难点突破02 利用传统方法求线线角、线面角、二面角与距离(四大题型)(已下线)第八章 立体几何初步(压轴题专练)-单元速记·巧练(人教A版2019必修第二册)(已下线)重难点专题13 轻松搞定线面角问题-【帮课堂】(苏教版2019必修第二册)(已下线)专题02 高一下期末真题精选(2)-期末考点大串讲(人教A版2019必修第二册)
解题方法
3 . 如图,在三棱台
中,
,H为BC的中点,点G在线段AC上,
平面FGH.
平面ABC,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/24/12abfaa3-1c84-43e4-8516-e26c79e362ad.png?resizew=223)
(1)求三棱台
的体积;
(2)求证:点G为AC的中点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8783bc74553bf44b61d999a0e4144bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ef213619b414839178423bd71b4f81e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e3c0430146b7b8d40ebb721a4d0de19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7b5a90e556da12d63b7f481bd8e874c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7ee687c3ad4a6e97315491c619fc94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/24/12abfaa3-1c84-43e4-8516-e26c79e362ad.png?resizew=223)
(1)求三棱台
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8783bc74553bf44b61d999a0e4144bb.png)
(2)求证:点G为AC的中点.
您最近一年使用:0次
4 . 如图,一个高为8的三棱柱形容器中盛有水,若侧面
水平放置时,水面恰好过AC,BC,
,
的中点E,F,G,H.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/c13d24b9-943c-4d9e-a85f-cdf07d982eb7.png?resizew=293)
(1)直接写出直线FG与直线
的位置关系;
(2)有人说有水的部分呈棱台形,你认为这种说法是否正确?并说明理由.
(3)已知某三棱锥的底面与该三棱柱底面
全等,若将这些水全部倒入此三棱锥形的容器中,则水恰好装满此三棱锥,求此三棱锥的高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/c13d24b9-943c-4d9e-a85f-cdf07d982eb7.png?resizew=293)
(1)直接写出直线FG与直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8a295e9474afc5e3628832bd3724f1.png)
(2)有人说有水的部分呈棱台形,你认为这种说法是否正确?并说明理由.
(3)已知某三棱锥的底面与该三棱柱底面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解题方法
5 . 已知正四棱台两底面边长分别为2和4,若侧棱与底面所成的角为
,
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759810186305536/2777765159362560/STEM/e25995f6-e8e5-4bc5-bd00-357caf2b690f.png?resizew=252)
(1)求棱台的高.
(2)求棱台的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759810186305536/2777765159362560/STEM/e25995f6-e8e5-4bc5-bd00-357caf2b690f.png?resizew=252)
(1)求棱台的高.
(2)求棱台的表面积.
您最近一年使用:0次
6 . 如图所示,正四棱台
的高是17cm,上、下两底面的边长分别是4cm和16cm,求这个棱台的侧棱长和斜高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c92b5799d12ea37de46d7c942ce7a9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/ad3ab0fe-2395-4c24-a4b4-08eb3e26f2ed.png?resizew=173)
您最近一年使用:0次
2020-01-31更新
|
472次组卷
|
6卷引用:安徽省蚌埠市2020-2021学年高二上学期期末理科数学试题