如图,长方体
中,
;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/556eac8d-5887-4d9a-b8cf-015f87eacb89.png?resizew=132)
(1)求异面直线
和
所成角的大小;
(2)求三棱柱
的体积和表面积;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf1a674bec9165d62dfbf0bd5ba41dd5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/556eac8d-5887-4d9a-b8cf-015f87eacb89.png?resizew=132)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)求三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa2a8383224caff286f05355f86882e.png)
更新时间:2021-03-22 18:35:35
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,在直四棱柱ABCD—
中,底面ABCD是边长为2的菱形,△ABD为等边三角形,
,
.直四棱柱ABCD—
的表面积为
.
的长;
(2)求二面角
Q的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/382c996fe22ad7977c4e59cf7b917e1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f44d4cf8d3f051cd82d3e7244b8c8e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b40c65a41af2927f007fe196d2348f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73966df28c13ec50cf35301f2e5baad4.png)
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解答题-问答题
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适中
(0.65)
解题方法
【推荐2】如图,在直三棱柱
中,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/21/17e60baf-6cb3-4ded-9782-b2d3a941e11a.png?resizew=150)
(1)证明:
平面
.
(2)若
是正三角形,
,
,求三棱柱
的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/21/17e60baf-6cb3-4ded-9782-b2d3a941e11a.png?resizew=150)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1c920d02068d0e63ffdab70786c526d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed2f706801662432b68797e72647c6e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5cc6961b320ced1383f6171016ad2e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
解题方法
【推荐1】如图,直四棱柱
中,四边形
为梯形,
,且
.过
三点的平面记为
,
与
的交点为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/1/38e8f68b-6006-41bd-9470-b1a0cf9265eb.png?resizew=142)
(1)证明:
为
的中点;
(2)求此四棱柱被平面
所分成上下两部分的体积之比.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e839ac941e8bf536ff35a12e56c7a400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0dfa9d9e982eafd09e850cfdaeea2a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/1/38e8f68b-6006-41bd-9470-b1a0cf9265eb.png?resizew=142)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
(2)求此四棱柱被平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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【推荐2】如图,三棱柱
的所有棱长都是
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/aa46957c-9fd6-4a90-a62e-28b1f40dfd5a.png?resizew=189)
(1)求三棱柱
的全面积;
(2)若该三棱柱
的体积为
,且
在下底面的正投影为下底面的中心
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdafc56f500b3e3772f544c8c5fb7ac2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3db146bc9bf306e406cc8c7294f2488a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/aa46957c-9fd6-4a90-a62e-28b1f40dfd5a.png?resizew=189)
(1)求三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
(2)若该三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】在三棱锥
中,
,
,
两两互相垂直,E为
的中点,且
,求直线AE与BC所成角的大小(用两种方法解答).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bef9de8db4d3ad85abdfb5d854082acb.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
【推荐2】如图,在正三棱柱
中,底面边长为2,异面直线
与
所成角的大小为
.
![](https://img.xkw.com/dksih/QBM/2020/2/3/2390902154592256/2392341148041216/STEM/834f1403c4784f2bbeb31b2d1599bfd8.png?resizew=162)
(1)求侧棱
的长;
(2)求
与平面
所成角的大小(结果用反三角函数表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454b7eac789f10f356b91f0918bc76eb.png)
![](https://img.xkw.com/dksih/QBM/2020/2/3/2390902154592256/2392341148041216/STEM/834f1403c4784f2bbeb31b2d1599bfd8.png?resizew=162)
(1)求侧棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】如图,在三棱锥
中,底面
是边长为2的等边三角形,侧棱
,
,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016165920768/1572016171565056/STEM/753d73e4a53a474b980a5c4e829579af.png?resizew=260)
(1)求证:
∥平面
;
(2)求证:
平面
;
(3)求异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65d5853c26657db448af610ac72cca4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d5df92548825892c451cc423389ba63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa7eeef77943d9a8f913ddf27604328.png)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016165920768/1572016171565056/STEM/753d73e4a53a474b980a5c4e829579af.png?resizew=260)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(3)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】如图,在空间四边形
中,
,
,
,延长
到
,使
,取
中点
,求异面直线
与
的距离和它们所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a06c2ff56ff0bdd24682d1272ad9535.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7967ef916f866ac8007c4a6ad8213c3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ecf8e338ef7525688117b2fe5bb917e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc7897e3f49075943704f4dbef82e5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/acc641c3-60bc-4731-93e2-3fc91d1c31c5.png?resizew=166)
您最近一年使用:0次