1 . 如图甲,在
中,∠B=90°,BC=1,AB=2,D、E分别是AB、AC边上的动点(除去端点),满足
,
.现将△
沿DE折起,使点A到达点A'的位置,连接A'B,A'C得到如图乙所示的四棱锥A'-DBCE.
![](https://img.xkw.com/dksih/QBM/2022/2/10/2913562102841344/2926158898552832/STEM/99c0eb7928f64e4bb7b0e123d5b013b2.png?resizew=140)
![](https://img.xkw.com/dksih/QBM/2022/2/10/2913562102841344/2926158898552832/STEM/b7795cca6bc2497c8cb5484af0117652.png?resizew=175)
(1)设l为平面A'DE与平面
的交线,求证:l//平面DBCE;
(2)若A'D⊥BD,则当
为何值时,四棱锥A'-DBCE的体积最大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f8b2287194cbc11b6f2ca16e57c990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9803747992ce4d717160187a4388a41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://img.xkw.com/dksih/QBM/2022/2/10/2913562102841344/2926158898552832/STEM/99c0eb7928f64e4bb7b0e123d5b013b2.png?resizew=140)
![](https://img.xkw.com/dksih/QBM/2022/2/10/2913562102841344/2926158898552832/STEM/b7795cca6bc2497c8cb5484af0117652.png?resizew=175)
(1)设l为平面A'DE与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9834675e3f6975696f2dc7edf5fe1f7.png)
(2)若A'D⊥BD,则当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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解题方法
2 . 在如图所示的几何体中,四边形ABCD为正方形,
平面ABCD,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/44534efe-687a-4d8b-85b1-25d60ccd1609.png?resizew=152)
(1)求证:
平面PAD;
(2)求直线AB与平面PCE所成角的正弦值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e2605cd905f703a8fda77540347ad9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60634341a9603e24b2bbc6960abe3d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82465b63174087aeba7788ed984583d2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/44534efe-687a-4d8b-85b1-25d60ccd1609.png?resizew=152)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a20ea69475dcf57a5ff18c13eceaaa.png)
(2)求直线AB与平面PCE所成角的正弦值;
您最近一年使用:0次
解题方法
3 . 如图,在三棱锥
中,
是边长为
的正三角形,
,
分别是
,
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/e9466182-4674-462c-b79c-8e911bd06a54.jpg?resizew=204)
(1)求证:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c14a66ed4bd66df65bc42c4ac1ed15c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/e9466182-4674-462c-b79c-8e911bd06a54.jpg?resizew=204)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
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解题方法
4 . 如图,在
中,
,斜边
,现将
绕AC旋转一周得到一个圆锥,BD为底面圆的直径,点P为圆锥的内切球O与CD的切点,
为圆锥底面圆周上异于B,D的一点.
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899097133785088/2909186812116992/STEM/ced9138e-51f2-4233-8eab-e939227fad82.png?resizew=267)
(1)求内切球O的体积;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564e238659b316ab3275829470ce0c89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899097133785088/2909186812116992/STEM/ced9138e-51f2-4233-8eab-e939227fad82.png?resizew=267)
(1)求内切球O的体积;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954c584f9c868d235e0fc1debb14428d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/113c87d7b997847259f17ee8576ee44c.png)
您最近一年使用:0次
名校
解题方法
5 . 如图,在三棱柱
中,
为棱
的中点,
平面
.
![](https://img.xkw.com/dksih/QBM/2022/1/23/2901175715094528/2910561972363264/STEM/3b35aae8-6bce-4451-93d2-7f16d287d98e.png?resizew=206)
(1)试确定点
的位置,并证明
平面
;
(2)若
是等边三角形,
,
,且平面
平面
,求四面体
的体积.
![](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/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a38e90ebca7e3403a70bd3c3eb1cc6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33346a15ff78b784a1f7c1f29ebdc85a.png)
![](https://img.xkw.com/dksih/QBM/2022/1/23/2901175715094528/2910561972363264/STEM/3b35aae8-6bce-4451-93d2-7f16d287d98e.png?resizew=206)
(1)试确定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b625cf58375c5c5076f43f6b444db3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4a1f5a0cdcabfcb417d26f69b337de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92105835f8075cb75dff244e908370b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/131c735c1736250c608af9f0d2d185fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ebaa9d4b7d116de59ad789386b09d61.png)
您最近一年使用:0次
2022-02-06更新
|
708次组卷
|
3卷引用:安徽省合肥市2021-2022学年高三上学期第一次教学质量检测文科数学试题
安徽省合肥市2021-2022学年高三上学期第一次教学质量检测文科数学试题(已下线)解密14 空间中的平行与垂直 (讲义)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(全国通用)四川省成都市石室中学2021-2022学年高三下学期“三诊模拟”文科数学试题
名校
解题方法
6 . 如图,在四棱锥
中,底面ABCD是正方形,AC、BD相交于点O,侧棱
底面
,
,E是PC的中点,过E作
交PB于点F,连FB接DF,BE.
![](https://img.xkw.com/dksih/QBM/2022/2/12/2915036850905088/2938442768924672/STEM/448a7d99a65141e896d4b570af6f13b9.png?resizew=366)
(1)求证:
平面
;
(2)设正方形边长为2,求四面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43d4c42112e0a22f240ce2ae432e5b4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4a6a1e70241d600bc6c104313eac61.png)
![](https://img.xkw.com/dksih/QBM/2022/2/12/2915036850905088/2938442768924672/STEM/448a7d99a65141e896d4b570af6f13b9.png?resizew=366)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/373f735f0f04d11f1951eaef1bb78b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)设正方形边长为2,求四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fd1bc6147d69777b26a35d48522f7e.png)
您最近一年使用:0次
名校
7 . 如图,在三棱柱
中,所有棱长均为
.
![](https://img.xkw.com/dksih/QBM/2022/3/23/2942537901555712/2943933300137984/STEM/c8f9e0e7416d48fdaa590a0f24436a6f.png?resizew=174)
(1)证明:平面
平面
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0d6fca51a92ac9661030a795657fc58.png)
![](https://img.xkw.com/dksih/QBM/2022/3/23/2942537901555712/2943933300137984/STEM/c8f9e0e7416d48fdaa590a0f24436a6f.png?resizew=174)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df00cdf77ed39ca5a0b305861a693142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ffdb9543ecf8a3bcdd2e09c2d4e9a8.png)
您最近一年使用:0次
2022-03-25更新
|
1599次组卷
|
5卷引用:安徽省合肥市第十中学2021-2022学年高二下学期期末模拟数学试题1
名校
解题方法
8 . 如图,菱形ABCD中
,把△BDC沿BD折起,使得点C至P处.
![](https://img.xkw.com/dksih/QBM/2022/5/28/2989280741318656/2991060941152256/STEM/c24590ae-e996-4624-b82c-60d32d8803e3.png?resizew=567)
(1)证明:平面PAC⊥平面ABCD;
(2)若
与平面ABD所成角的余弦值为
,
,求三棱锥P—ABD的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6906f59d09ce31956d6f5ea2b23fc77.png)
![](https://img.xkw.com/dksih/QBM/2022/5/28/2989280741318656/2991060941152256/STEM/c24590ae-e996-4624-b82c-60d32d8803e3.png?resizew=567)
(1)证明:平面PAC⊥平面ABCD;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
您最近一年使用:0次
名校
解题方法
9 . 如图,圆锥
的母线长为
,
是
的内接三角形,
.
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983618612707328/2984792306597888/STEM/ca146d52-c878-402e-9552-26a6b158b3f2.png?resizew=204)
(1)若
是正三角形,求三棱锥
的体积;
(2)若平面
平面
,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffc2817fa590affb5a760a25dc65308.png)
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983618612707328/2984792306597888/STEM/ca146d52-c878-402e-9552-26a6b158b3f2.png?resizew=204)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05740f0c6071846227dc0ec177ad15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/036de574712cad14bddadf6653c7e714.png)
您最近一年使用:0次
2022-05-22更新
|
608次组卷
|
2卷引用:安徽省皖江名校2022届高三下学期最后一卷文科数学试题
10 . 如图,直三棱柱ABC-A1B1C1中,D,E分别是AB,BB1的中点,AA1=AC=CB=
AB.
![](https://img.xkw.com/dksih/QBM/2021/11/6/2845467340947456/2849234123825152/STEM/cee65f7f-a2fd-4504-a3ad-037ae8ecde7a.png)
(1)证明:BC1∥平面A1CD;
(2)求异面直线BC1和A1D所成角的大小;
(3)当AB=2
时,求三棱锥C-A1DE的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://img.xkw.com/dksih/QBM/2021/11/6/2845467340947456/2849234123825152/STEM/cee65f7f-a2fd-4504-a3ad-037ae8ecde7a.png)
(1)证明:BC1∥平面A1CD;
(2)求异面直线BC1和A1D所成角的大小;
(3)当AB=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
您最近一年使用:0次
2021-11-11更新
|
784次组卷
|
5卷引用:安徽省滁州市定远县育才学校2021-2022学年高二下学期期末文科数学试题