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解题方法
1 . 已知四边形ABCD为等腰梯形,
,l为空间内的一条直线,且
平面ABCD,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4031f4aae0b996ce8fec956fb2879f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d4321ff1b32ebd9db6cd6d892d4d821.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() |
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解题方法
2 . 如图,在直三棱柱
中,△
为边长为2的正三角形,
为
中点,点
在棱
上,且
.
时,求证
平面
;
(2)设
为底面
的中心,求直线
与平面
所成角的正弦值的最大值,并求取得最大值时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/645b45818c7a7c68a772a30262277c8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38a1794201d5a18fe46cfb6901c7f0d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441809d6ce2df21a85b390cdce9b1112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4525c00ed908bed8ba8d353e747a858.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c4c2157cf374ebe6352715ef100471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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3 . 如图是一个正方体的平面展开图,则在该正方体中( )
A.![]() | B.![]() |
C.![]() ![]() | D.![]() ![]() |
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4 . 如图,已知直三棱柱
的所有棱长均为3,
分别在棱
,
上,且
分别为
的中点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a898391acfefad6656a81913f51d0255.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4fb1884afa6b9d2625b489d6a0b4667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d30c66a2e690e16481dea00b24703149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c254c270c8358673abfee56c3f2ff485.png)
A.![]() ![]() |
B.若![]() ![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.过点![]() ![]() ![]() ![]() |
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5 . 如图,在四棱锥
中,底面
是由等边三角形
和等腰三角形
构成,其中
为棱
上一点,
平面
.
的值;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dfaad4c4467e27421876d8f2a4371d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbbd91c12baa323305e63f2069c50136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9428c4a6a25d360a036aaf0a92e40988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ca5b5fd1031438de2d2dd59be8c348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06081a74839925e0bb82910e0df3473d.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ca5b5fd1031438de2d2dd59be8c348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
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解题方法
6 . 在长方体
中,
,
,点
为
的中点,点
为四边形
内一点,且
,则直线
与平面
所成角的正切值的最大值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db57eca2a7cbd91bc57372592580a76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f6e349d06e669d2e02ecbc69f6bb9cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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解题方法
7 . 如图所示,正方体
的棱长为
分别为
的中点,点
满足
.
,证明:
平面
;
(2)连接
,点
在线段
上,且满足
平面
.当
时,求
长度的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b684d2e78a0eb1b406913f2730e1d226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fef1fc63360a6da2e076505f1fc2dbd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a151755a39b4209e75645d39a8427af6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3cf0f585938ede9eca890a6eb326d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8badfeb9e7556486e02ab60df4dd32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43713ea7ad8151c6d035f9c7c63996d0.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417546ea1b98d330624f1eb50e1dc54c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c1778e7c419cb37224a753264666ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aebbfe5e1e3a23269101ae0e9b05a3fe.png)
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河北省邯郸市大名县第一中学2023-2024学年高一下学期5月月考数学试卷浙江省杭州第二中学2023-2024学年高一下学期期中考试数学试卷(已下线)6.4.1直线与平面平行-【帮课堂】(北师大版2019必修第二册)
8 . 若正四棱台的上底边长为
,下底边长为
,高为
,则它的体积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
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解题方法
9 . 用一个内底面直径为3,高为20的圆柱体塑料桶去装直径为2的小球,最多能装下小球个数为( )
A.10 | B.11 | C.12 | D.13 |
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10 . 边长为2的正三角形的直观图的面积是( )
A.![]() | B.![]() | C.![]() | D.![]() |
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河北省邯郸市大名县第一中学2023-2024学年高一下学期5月月考数学试卷浙江省宁波市镇海中学2023-2024学年高一下学期期中考试数学试卷(已下线)6.2直观图-【帮课堂】(北师大版2019必修第二册)