刍(chú)甍(méng)是几何体中的一种特殊的五面体.中国古代数学名著《九章算术》中记载:“刍甍者,下有袤有广,而上有袤无广。刍,草也。甍,屋盖也。求积术曰:倍下表,上袤从之,以广乘之,又以高乘之,六而一。”翻译为“底面有长有宽为矩形,顶部只有长没有宽为一条棱,刍甍字面意思为茅草屋顶。……”现有一个刍甍如图所示,四边形
为长方形,
平面
,
和
是全等的等边三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/7780e746-40f8-42e7-830b-6f19754e907a.png?resizew=231)
(1)求证:
;
(2)若已知
,求该五面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6830ebecddbd9759be626289c408e4f3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/7780e746-40f8-42e7-830b-6f19754e907a.png?resizew=231)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06772d7ccc921f77319c503c23326be2.png)
(2)若已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c589c8207e40ad3355bbb8167de3486.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
2023高一·全国·专题练习 查看更多[4]
(已下线)第31讲 空间几何体体积及点到面的距离问题4种题型(已下线)高一数学下学期期中模拟试题03(平面向量、解三角形、复数、立体几何)(已下线)立体几何专题:空间几何体体积的5种题型广东省深圳科学高中2022-2023学年高一下学期期中数学试题
更新时间:2023-04-01 23:04:41
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解答题-证明题
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解题方法
【推荐1】如图,已知⊙O的直径AB=3,点C为⊙O上异于A,B的一点,VC⊥平面ABC,且VC=2,点M为线段VB的中点.
![](https://img.xkw.com/dksih/QBM/2015/2/10/1571987247874048/1571987253248000/STEM/7febf4fbb04744efa1414a4bc469cd8d.png)
(1)求证:BC⊥平面VAC;
(2)若直线AM与平面VAC所成角为
.求三棱锥B-ACM的体积.
![](https://img.xkw.com/dksih/QBM/2015/2/10/1571987247874048/1571987253248000/STEM/7febf4fbb04744efa1414a4bc469cd8d.png)
(1)求证:BC⊥平面VAC;
(2)若直线AM与平面VAC所成角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa42b56b1c92689a080b58cb603a642.png)
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【推荐2】如图,在三棱柱
中,
平面
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572700095651840/1572700101492736/STEM/7eb8832aa12a4078bc8cf3f2d8aa0dcb.png)
(Ⅰ )过
的截面交
于
点,若
为等边三角形,求出点
的位置;
(Ⅱ)在(Ⅰ)条件下,求四棱锥
与三棱柱
的体积比.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f47d6a88e962cd790d2f159c021ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19434b67703318b18be7efee7be590bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4482938199ddfa1129dc9c9975c3d35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572700095651840/1572700101492736/STEM/7eb8832aa12a4078bc8cf3f2d8aa0dcb.png)
(Ⅰ )过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a696a182fff038a86b2bbe8ca099442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6843586b42b60fd0da03f516edfc12f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(Ⅱ)在(Ⅰ)条件下,求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb4af10aedc87f29cbb62d52c1ff8a73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f47d6a88e962cd790d2f159c021ec1.png)
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【推荐1】如图所示的五面体
中,平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
平面
,
,
,
∥
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/eed27dd5-5855-4aa4-ba45-fc2293db7059.png?resizew=160)
(Ⅰ)求证:
∥平面
;
(Ⅱ)求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d5427b7b994b860628df3d6b7a07de8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d00572a90232e08932317af2a53767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e0b64d25ddd18454f88e40c45d7d8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5441d73845911db1993bf903c4d8700f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/eed27dd5-5855-4aa4-ba45-fc2293db7059.png?resizew=160)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(Ⅱ)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5ba482836565abad208665cf7b9972.png)
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【推荐2】已知在正三棱柱
中,
,
是棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/8801dc43-0dcd-4a61-add6-b9486eda528a.png?resizew=154)
(1)求证:平面
平面
;
(2)设
,求三棱锥
的体积;
(3)若把平面
与平面
所成的锐二面角为60°时的正三棱柱称为“黄金棱柱”,请判断此三棱柱是否为“黄金棱柱”,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1baa3d0db9ad31d33c2883a6efed1dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/8801dc43-0dcd-4a61-add6-b9486eda528a.png?resizew=154)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0532c912a8b7953d35c6aac416478325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/535f8339a89efeee816285420a7c5119.png)
(3)若把平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f233b375753611ffa7a93c2c12ef5e28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
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解答题-证明题
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【推荐1】如图,四棱锥
中,
平面
,
平面
,且
,点
为线段
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/cc558099-352b-44f6-a81a-e0b1636f3f6f.png?resizew=187)
(1)求证:
//平面
;
(2)求平面
截四棱锥
所得多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4a21b4786e10f51849cf8f844ca238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5c3aec3e9c309e72d096c0a86f4e1a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/962cdb84a4a8cc279bb54e19cb76c7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f2421a237ba1736d79739c70f446605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/cc558099-352b-44f6-a81a-e0b1636f3f6f.png?resizew=187)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00d4825584cf2a3f381de72c179e22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4a21b4786e10f51849cf8f844ca238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf759e2694051bfa8eb987f94819ae0f.png)
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【推荐2】如图,在五面体
中,底面
为矩形,
,
,过
的平面交棱
于
,交棱
于
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/1b8f7ed2-8963-41b9-a5b1-e88d618e56c7.png?resizew=155)
(1)证明:
平面
;
(2)若
,
,
,求五面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e89556992cbfd7043330ac7421d342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/058f36d315245b63a811d5c6f348c17b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0085ee46fbc2a1d3bd98aec14cd8b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a477603f3f88c3b48352b6130f9ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/1b8f7ed2-8963-41b9-a5b1-e88d618e56c7.png?resizew=155)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72221ee5b504d596ff799c0b356aa0ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a0d2a2415ec1e1374ac46bc232f450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65ac8eb186c7f68ee35608b306eca420.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee69d2552bd48ff07358fe40f23127de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e89556992cbfd7043330ac7421d342.png)
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【推荐3】如图,在多面体
中,上、下底面平行且均为矩形,相对的侧面与同一底面所成的二面角大小相等,侧棱延长后相交于E,F两点,上、下底面矩形的长、宽分别为c,d与a,b,且a>c,b>d,两底面间的距离为h.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/ec9a9a6d-8a31-4c5b-a286-a510f114a143.png?resizew=242)
(1)求侧面
与底面
所成二面角的大小;
(2)证明:
;
(3)在估测该多面体的体积时,经常运用近似公式
来计算,已知它的体积公式是
,试判断
与V的大小关系,并加以证明.
注:与两个底面平行,且到两个底面距离相等的截面称为该多面体的中截面.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/ec9a9a6d-8a31-4c5b-a286-a510f114a143.png?resizew=242)
(1)求侧面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f67eaf0a9ead191ae26e84dd0d12b6.png)
(3)在估测该多面体的体积时,经常运用近似公式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a02fce86b05e431bd95aa97ac29312.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb43e591021b79f00642d5ca2d2bf738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac758a10c1fc71d638145aeb8dcd3834.png)
注:与两个底面平行,且到两个底面距离相等的截面称为该多面体的中截面.
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【推荐1】已知底面为菱形的四棱锥
中,
是等边三角形,平面
平面ABCD,E,F分别是棱PC,AB上的点,从下面①②③中选取两个作为条件,证明另一个成立;①F是AB的中点;②E是PC的中点;③
平面PFD.(只需选择一种组合进行解答即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/137fcdac119eff6ac5990b6d201615df.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/41200c40-477a-40d7-9dd6-132738e68091.png?resizew=201)
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【推荐2】如图,三棱锥P﹣ABC中,平面PAC⊥平面ABC,∠ABC=
,点D、E在线段AC上,且AD=DE=EC=2,PD=PC=4,点F在线段AB上,且EF
面PBC.
![](https://img.xkw.com/dksih/QBM/2016/3/8/1572526481702912/1572526487830528/STEM/cafcb6fe7aca48eabe9f255ca27da2fa.png?resizew=212)
(1)证明:EF
BC.
(2)证明:AB⊥平面PFE.
(3)若四棱锥P﹣DFBC的体积为7,求线段BC的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://img.xkw.com/dksih/QBM/2016/3/8/1572526481702912/1572526487830528/STEM/cafcb6fe7aca48eabe9f255ca27da2fa.png?resizew=212)
(1)证明:EF
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
(2)证明:AB⊥平面PFE.
(3)若四棱锥P﹣DFBC的体积为7,求线段BC的长.
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