名校
解题方法
1 . 以等腰直角三角形
的斜边
上的高
为折痕,把
和
折成互相垂直的两个平面后,某学生得出下列四个结论:
①
; ②
是等边三角形;
③三棱锥
是正三棱锥 ④平面
平面
.
其中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/2021/12/15/2873154521276416/2873301331484672/STEM/bfc55fcc264848148d1a2db26506d323.png?resizew=301)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70734a8e672376bb0bd1522e229f86a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eb30368afe1ddd6ab11e5d0137125c9.png)
③三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06123e81c41198c76a3335757fac2c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
其中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/2021/12/15/2873154521276416/2873301331484672/STEM/bfc55fcc264848148d1a2db26506d323.png?resizew=301)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
2021-12-15更新
|
604次组卷
|
5卷引用:陕西省西安市建筑科技大学附中2021-2022学年高一上学期第二次月考数学试题
名校
解题方法
2 . 如图,在四棱锥
中,底面四边形
是边长为12,
的菱形,侧面
是
的等腰直角三角形,M为
的中点,且平面
平面
.
![](https://img.xkw.com/dksih/QBM/2021/11/19/2854609771372544/2865399260930048/STEM/297d2495-0b81-4dd7-8dbb-f8f57236871b.png?resizew=183)
(1)求四棱锥
的体积;
(2)求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4234cf4d8159f5df0333bcc269ffe099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bba8e0d0a84be821e404c93852543ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b697531c952c87cdb2fc287314937bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2021/11/19/2854609771372544/2865399260930048/STEM/297d2495-0b81-4dd7-8dbb-f8f57236871b.png?resizew=183)
(1)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(2)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
您最近一年使用:0次
2021-12-04更新
|
252次组卷
|
2卷引用:陕西省西安市八所重点中学2021-2022学年高三上学期联考 (一)文科数学试题
名校
解题方法
3 . 已知平面
与平面
交于直线
,且直线
,直线
,且直线
,
,
不重合,则下列命题错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72d2a947e3fdc214d40a7d3f54679a73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5475e10ea3f37788e680395999037a00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
A.若![]() ![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() |
您最近一年使用:0次
2022-03-27更新
|
460次组卷
|
4卷引用:陕西省渭南市咸林中学2021-2022学年高一上学期第三阶段质量检测数学试题
20-21高一·全国·课后作业
名校
4 . 如图,已知AB是平面
的垂线,AC是平面
的斜线,
.
,求证:平面
平面ACD;
(2)若平面
平面ACD,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aea7dbe250e777e095917e8b495484f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bfa14df2e34162f35f421f2ae598cc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bfa14df2e34162f35f421f2ae598cc2.png)
您最近一年使用:0次
2021-11-13更新
|
289次组卷
|
4卷引用:陕西省宝鸡市陈仓区虢镇中学2021-2022学年高一上学期12月月考数学试题
名校
5 . 已知点A是以BC为直径的圆O上异于B,C的动点,P为平面ABC外一点:且平面РВС
平面АВС,
,
,
.则三棱锥P-АВС外接球的表面积为_________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3755b2bcf7516eedb26a27ad73657216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96ee7262d0b5cbbade014e07e7373501.png)
您最近一年使用:0次
解题方法
6 . 如图,在三棱锥
中,平面
平面
,
,
,O,M分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/1404f8ab-1720-4cf3-be12-292d1b749030.png?resizew=143)
(1)证明:
平面
;
(2)求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4959250cb4f4289b7c5400c7bee0426.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e2e437445c2743a73be2d96cd1b1f2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/1404f8ab-1720-4cf3-be12-292d1b749030.png?resizew=143)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82fbcab0d22d1a9a29ea4abafac05036.png)
您最近一年使用:0次
2021-09-13更新
|
329次组卷
|
2卷引用:陕西省汉中市2021-2022学年高三上学期第一次校际联考文科数学试题
解题方法
7 . 如图(1)所示,已知正方形
的边长为2,延长
,使得M为
中点,连结
.现将
沿
折起,使平面
平面
,得到几何体
,如图(2)所示.
![](https://img.xkw.com/dksih/QBM/2021/5/31/2732965561581568/2801120564445184/STEM/341a055649134775b247cf2cadb0c900.png?resizew=398)
(1)求证:
平面
;
(2)求几何体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21533755bc8c6cb3a01cdb2ebd5ddf88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06123e81c41198c76a3335757fac2c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://img.xkw.com/dksih/QBM/2021/5/31/2732965561581568/2801120564445184/STEM/341a055649134775b247cf2cadb0c900.png?resizew=398)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(2)求几何体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
您最近一年使用:0次
8 . 如图,正三棱柱
中,
、
分别为
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/822c20e8-8e92-49fa-b348-1e64f59db815.png?resizew=155)
(1)证明:
平面
;
(2)若
,
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/822c20e8-8e92-49fa-b348-1e64f59db815.png?resizew=155)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42605242ae45b6223b23b7a70a2b1618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b2213b575a7cfaffcdf91885005c7d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf90bac174f02c4552e56df4d910bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b2213b575a7cfaffcdf91885005c7d.png)
您最近一年使用:0次
2021-08-07更新
|
969次组卷
|
4卷引用:陕西省安康市2020-2021学年高二下学期期末文科数学试题
陕西省安康市2020-2021学年高二下学期期末文科数学试题江西省南昌市豫章中学2021-2022学年高二上学期入学调研(A)数学(文)试题(已下线)专题8.4 直线、平面平行的判定及性质(练)- 2022年高考数学一轮复习讲练测(新教材新高考)(已下线)第八章 立体几何初步(压轴题专练)-单元速记·巧练(人教A版2019必修第二册)
解题方法
9 . 如图,在四棱锥
中,底面
是边长为
的菱形,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
为正三角形,且侧面
底面
,E为线段
的中点,M在线段
上.
![](https://img.xkw.com/dksih/QBM/2021/5/20/2725201910865920/2726315748270080/STEM/e9c6c927-4045-4981-b07c-61928b3fca9c.png?resizew=293)
(1)求证:
;
(2)当点
满足
时,求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/2021/5/20/2725201910865920/2726315748270080/STEM/e9c6c927-4045-4981-b07c-61928b3fca9c.png?resizew=293)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bc56fdf70e65bd88980c64af96b83da.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515cbd4812397175980507ca44572c3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d231b17c5992eee495184b0eae66749.png)
您最近一年使用:0次
2021-05-22更新
|
793次组卷
|
3卷引用:陕西省宝鸡市千阳中学2021届高三下学期第四次适应性训练文科数学试题
陕西省宝鸡市千阳中学2021届高三下学期第四次适应性训练文科数学试题(已下线)专题01 立体几何求体积-【解题思路培养】2022年高考数学一轮复习解答题拿分秘籍(全国通用版)重庆市缙云教育联盟2022-2023学年高一下学期期末数学试题
解题方法
10 . 如图,在四棱锥
中,底面
是边长为2的菱形,
,
为正三角形,且侧面
底面
,E为线段
的中点,M在线段
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/74c99804-a72e-48c6-99a8-144a13e9b976.png?resizew=197)
(1)求证:
;
(2)是否存在点M,使二面角
的大小为60°,若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/74c99804-a72e-48c6-99a8-144a13e9b976.png?resizew=197)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bc56fdf70e65bd88980c64af96b83da.png)
(2)是否存在点M,使二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90985b4cec465c6c3710ffe7e0ed9fae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47548785e478bc5b9591341a881e3127.png)
您最近一年使用:0次
2021-05-21更新
|
825次组卷
|
3卷引用:陕西省宝鸡市千阳中学2021届高三下学期第一次适应训练理科数学试题