解题方法
1 . 1.如图,在三棱台
中,
平面ABC,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb56654f525ec708bb4638199a6221e.png)
,
.
![](https://img.xkw.com/dksih/QBM/2021/12/10/2869376506740736/2869701086945280/STEM/842f2b1a-9de8-420f-913b-936d510bef45.png?resizew=315)
(1)证明:
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb56654f525ec708bb4638199a6221e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0a8d7e2cf039834f9e2f87cc1ca6a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54638dd4ebf19815a1333d84e42f927.png)
![](https://img.xkw.com/dksih/QBM/2021/12/10/2869376506740736/2869701086945280/STEM/842f2b1a-9de8-420f-913b-936d510bef45.png?resizew=315)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa8345302e8036af33d4598282144d7.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e2f7554a52815bfa0f4d75221ba7397.png)
您最近一年使用:0次
2021-12-10更新
|
580次组卷
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2卷引用:苏教版(2019) 选修第二册 名师精选 学业水平综合性测试卷
名校
解题方法
2 . 如图所示,在长方体
中,
,
,
,
是
中点,点
在侧面
(含边界)上运动,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/1b0fb8b8-12dc-4adc-9215-fb8a5b1d7879.png?resizew=146)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d0fdc5a00ca0e857b89a7e1420df29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/1b0fb8b8-12dc-4adc-9215-fb8a5b1d7879.png?resizew=146)
A.直线![]() ![]() ![]() |
B.存在点![]() ![]() ![]() |
C.存在点![]() ![]() |
D.若点![]() ![]() ![]() ![]() |
您最近一年使用:0次
2021-02-02更新
|
717次组卷
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4卷引用:苏教版(2019) 选修第二册 名师精选 学业水平综合性测试卷
20-21高三上·江苏南通·期中
解题方法
3 . 如图,在三棱柱
中,底面
是边长为
正三角形,侧面
是菱形,且平面
平面
,
,
分别是棱
,
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/8d9fb18a-f56b-452a-a5f9-f912a208bb3a.png?resizew=178)
(1)证明:
平面
;
(2)若①三棱锥
的体积为
;②
与底面
所成的角为
;③异面直线
与
所成的角为
.请选择一个条件求平面
与平面
所成的二面角(锐角)的余弦值.
![](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/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45963da68f1b237d5275e506f071eff.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/8d9fb18a-f56b-452a-a5f9-f912a208bb3a.png?resizew=178)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)若①三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/861d61d2b7b16e12fd97f870fb3fa522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e97fcdcfd6183b976a61ef3222c607.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
您最近一年使用:0次
2020-11-28更新
|
606次组卷
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3卷引用:苏教版(2019) 选修第二册 名师精选 学业水平综合性测试卷
苏教版(2019) 选修第二册 名师精选 学业水平综合性测试卷(已下线)江苏省南通市如皋市2020-2021学年高三上学期期中数学试题江苏省镇江市、南通市如皋2020-2021学年高三上学期教学质量调研(二)数学试题