1 . 如图,
是边长为
的等边三角形,
是等腰直角三角形,
,平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
平面
,且
平面
,
.
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572104088788992/1572104094826496/STEM/df4d0ca9860d40188b20f395afe28a5d.png)
(1)证明:
平面
;
(2)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/398f834aceea15b09c942b05343ec8da.png)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da95ecece2225aeaa4fd2ea84dc61753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ffa9d1471230c7da54859d087f6f87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4237f6a1fc115bb790aa10704b7908c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19efd943fe98bcea0394795a7bc06f33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f7d9f5e71bfef8188b1216c1276c2d.png)
![](https://img.xkw.com/dksih/QBM/2015/5/13/1572104088788992/1572104094826496/STEM/df4d0ca9860d40188b20f395afe28a5d.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/398f834aceea15b09c942b05343ec8da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
2 . 在三棱锥P-SBC中,A,D分别为边SB,SC的中点
平面PSB
平面ABCD,平面PAD
平面ABCD
![](https://img.xkw.com/dksih/QBM/2015/5/11/1572099271368704/1572099277340672/STEM/cc43a53fa440449c8bc87bd857fe00fe.png)
(1)求证:PA⊥BC;
(2)若平面PAD
平面PBC=
,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e5d4a28130aca6d30d9af3a1b84bb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4237f6a1fc115bb790aa10704b7908c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4237f6a1fc115bb790aa10704b7908c3.png)
![](https://img.xkw.com/dksih/QBM/2015/5/11/1572099271368704/1572099277340672/STEM/cc43a53fa440449c8bc87bd857fe00fe.png)
(1)求证:PA⊥BC;
(2)若平面PAD
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbc4670192a2d791f4c182485333dfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d6b00a89e37814c31c19d3286c921.png)
您最近一年使用:0次
3 . 如图,在四棱锥
中,
平面
,底面
是菱形,
,
为
与
的交点,
为
上任意一点.
(1)证明:平面
平面
;
(2)若
平面
,并且二面角
的大小为
,求
的值.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86db010859f7a243badec02946a4e24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/677d1863ff4d8ac1604b18149d4f320f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36222db36e348661eb5f616820e4e60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca48c18021e7be4bbb3e95576e1c1b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306681bd5aaa51e9c63ab3002e23dec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccfd81d120348601cd611241d1a5dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af53bde2b93b4707c79d00010ac9ff06.png)
![](https://img.xkw.com/dksih/QBM/2018/3/25/1909534314594304/1912476343926784/STEM/d7f94517aeb34b6b99a53db8b1b90065.png?resizew=164)
您最近一年使用:0次
2016-12-03更新
|
17次组卷
|
4卷引用:2015届广东省汕头市潮南区高三高考模拟二理科数学试卷
4 . 如图,三棱柱
中,平面
平面
,四边形
是矩形,
,
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572085973999616/1572085979873280/STEM/fa80563aa402407d918cf1f7546ddcb3.png)
(1)求证:
∥平面
;
(2)求点
到平面
的距离
.
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572085973999616/1572085979873280/STEM/c6a00bee8f6a45c2ba029eac5c11e056.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572085973999616/1572085979873280/STEM/449b7b76ca7f4040acae12d6f9ec89bc.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572085973999616/1572085979873280/STEM/813edde6fd5841d2b2b82d6ac43d4724.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572085973999616/1572085979873280/STEM/fb2000eb948a4849be1f4260cd3ef64f.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572085973999616/1572085979873280/STEM/7fd5834491784488aafce27af78f45d6.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572085973999616/1572085979873280/STEM/dee76f067cff42618e81fbfa61cda958.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572085973999616/1572085979873280/STEM/ec599b46687e46d691ca21de7a869d0f.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572085973999616/1572085979873280/STEM/fa80563aa402407d918cf1f7546ddcb3.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572085973999616/1572085979873280/STEM/db3fc54f18214f9d9521f6cc94194323.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572085973999616/1572085979873280/STEM/5d87e0202c564c3fb3808bb209bfc74c.png)
(2)求点
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572085973999616/1572085979873280/STEM/51b8e4ff00874462b5140c9f683c2b68.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572085973999616/1572085979873280/STEM/97432a2afc824ded807e2e32ac1f1a4d.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572085973999616/1572085979873280/STEM/bc95834f63c34eecb69cacecbac2c78e.png)
您最近一年使用:0次
5 . 已知平面α,β,直线
.给出下列命题:
① 若
,
,则
;
② 若
,
,则
;
③ 若
,则
;
④ 若
,
,则
.
其中是真命题的是_________ .(填写所有真命题的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
① 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34512482dc6ca8f32d80e4b37d64086b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6328a5e1a42e99c8f30749b99bf2725.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de666db0febae223cc4d1dc189d71ca6.png)
② 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de666db0febae223cc4d1dc189d71ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5397292543f91f0e0d37a72f1b53c79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0258342fb0eff42b5d37cbe42b6c89b.png)
③ 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3264ffd2699e4e49b5732c47082dfb6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
④ 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4285fe5b27731c6f503dd4d8fdd70746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b6e422b2e6f6dada4d8c369559a077.png)
其中是真命题的是
您最近一年使用:0次
2016-12-03更新
|
1340次组卷
|
4卷引用:2015届江苏省南京市、盐城市高三第二次模拟考试数学试卷
6 . 如图,在四棱锥P-ABCD中,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2015/4/22/1572080470777856/1572080476766208/STEM/138a2b2ec4a2484e81cf2bffeddc83c0.png)
(1)求证:
平面
;
(2)若M为线段PA的中点,且过
三点的平面与PB交于点N,求PN:PB的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d47ad7ef0a17747fc54fe058bcb8d1a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1607979244332a1d3b0644565d717cc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96dae94a9c26b6dd1dbcdebd20373033.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004f383a97abb57639ef007b87f8e967.png)
![](https://img.xkw.com/dksih/QBM/2015/4/22/1572080470777856/1572080476766208/STEM/138a2b2ec4a2484e81cf2bffeddc83c0.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc3719c11b0b0ae54d43d6f45fe7b1f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若M为线段PA的中点,且过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eccdc4ff32d3d8662711bcf42c5e605.png)
您最近一年使用:0次
7 . 如图,在四棱柱
中,底面
是等腰梯形,
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e921f46d90e43f4517c55832b6280f9.png)
∥
,顶点
在底面
内的射影恰为点
.
![](https://img.xkw.com/dksih/QBM/2015/4/13/1572067450290176/1572067456212992/STEM/129b29b3ebc147e3829b723cbff7d6c0.png)
(Ⅰ)求证:
;
(Ⅱ)在
上是否存在点
,使得
∥平面
?若存在,确定点
的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8456cee87c4e22351affc28f3a73a0f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e921f46d90e43f4517c55832b6280f9.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/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2015/4/13/1572067450290176/1572067456212992/STEM/129b29b3ebc147e3829b723cbff7d6c0.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c530ae8e3cc2e7055c7e1fb2996fac1d.png)
(Ⅱ)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ef601ca1f9c4c031adab4ffed297f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
8 . 如图1,在
中,
,
,
,
、
分别为
、
的中点,连接
并延长交
于
,将
沿
折起,使平面
平面
,如图2所示.
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572038754500608/1572038760267776/STEM/b1c42092dd18472ca398ea472765fb2a.png)
(1)求证:
平面
;
(2)求平面
与平面
所成的锐二面角的余弦值;
(3)在线段
上是否存在点
使得
平面
?若存在,请指出点
的位置;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efdf1b600011cb096ecf1ceae6056b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a19748349db994030cf0b8cf1d94ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d304a517ee0cc4b81d794a8ff188b2c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e33ccc70b853067d184dcc5b8459de04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0b669ef4514f24ee09adeff7f41238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ebbd866e455cf80ea669c9f56f792c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9febb0e53890d2fb72fdfd7f0aa88acc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccdaa0ce95c0c22db19fe7f5110d7818.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4afa86900c651a7ce4a2a180e06f9008.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588a2119bc5e8cdf4731828b195a7892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2391c0e2fc44598610d519dacb778062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c80f55401e3ff1340e690d28d050ab53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccdaa0ce95c0c22db19fe7f5110d7818.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f56db6807176b84a8086e4703bbadfdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43eb4291f4add02768709aa2b1f9100d.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572038754500608/1572038760267776/STEM/b1c42092dd18472ca398ea472765fb2a.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7d31b98dafe3d4ea53f3d345ccd25a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43eb4291f4add02768709aa2b1f9100d.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ef5cba460c92763627726e61f3c7d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c4a712dbb7b0220b00de71d764d6fd.png)
(3)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7382071f035087d3c35e3ffb741d981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f9c827e46d1a395fafbf15cdd6c6c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5953b79408207c1d47f07eb66bfb9f29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c4a712dbb7b0220b00de71d764d6fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f9c827e46d1a395fafbf15cdd6c6c42.png)
您最近一年使用:0次
9 . 如图,已知PA⊥⊙O所在的平面, AB是⊙O的直径,AB=2,C是⊙O上一点,且AC=BC=PA,E是PC的中点,F是PB的中点.
![](https://img.xkw.com/dksih/QBM/2015/3/25/1572032055377920/1572032061259776/STEM/63436f5ac9e34b538fc2655e68edce4c.png)
(1)求证:EF//平面ABC;
(2)求证:EF⊥平面PAC;
(3)求三棱锥B—PAC的体积.
![](https://img.xkw.com/dksih/QBM/2015/3/25/1572032055377920/1572032061259776/STEM/63436f5ac9e34b538fc2655e68edce4c.png)
(1)求证:EF//平面ABC;
(2)求证:EF⊥平面PAC;
(3)求三棱锥B—PAC的体积.
您最近一年使用:0次
2016-12-03更新
|
1015次组卷
|
2卷引用:2015届广东省肇庆市高中毕业班第一次统一检测文科数学试卷
10 . 四棱锥S-ABCD中,侧面SAD是正三角形,底面ABCD是正方形,且平面SAD⊥平面ABCD,M、N分别是AB、SC的中点.
(Ⅰ)求证:MN∥平面SAD;
(Ⅱ)求二面角S-CM-D的余弦值.
(Ⅰ)求证:MN∥平面SAD;
(Ⅱ)求二面角S-CM-D的余弦值.
您最近一年使用:0次