1 . 一个水平放置的平面图形的斜二测直观图是直角梯形
,如图所示,
,
,则原平面图形的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1602c3d3e9628cd503a443024410e87a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/770b02522e9cd236328eff3dd8bb432b.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
解题方法
2 . 如图,在四棱锥
中,底面
为菱形,
,
,
,
平面
,点M,N,H分别在棱PB,PD,PC上,且
.
;
(2)连接AC交BD于点O,连接OP.求证:
平面
;
(3)若H为PC的中点,PA与平面
所成角为60°,四棱锥
被平面
截为两部分,记四棱锥
体积为
,另一部分体积为
,求
.
![](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/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb96e0331eebe80ed1ff610faf531fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/debdc6632a4877e5131d3da25cda8b89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd68fe22ed9909165aedc98d1d8e3a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828247a3338571cb0d4ba2a5bf88929c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec6297cf195e60fd53375a501deb2ac.png)
(2)连接AC交BD于点O,连接OP.求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc6f007dbf1c1a36eb031e520608403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)若H为PC的中点,PA与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd68fe22ed9909165aedc98d1d8e3a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73bb075576cc0f585bda44277ac1d098.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4764374bd2fb78e59cd0b283637baeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63055a5d6916f99d07fede49120753f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f737b04ce09bc7e1ed86dc9b3c85203b.png)
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解题方法
3 . 已知向量
,且
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937265242f58e1791aa0d6c844a88a22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f69630383bf5d6bbd32056d0401cd28d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5931ee20460c2c2645d82aee30a1b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
4 . 已知向量
,若
与
共线,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b6a4ac5fce00cf467fe9ab8496f133.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b4e49d17d4ad440d37c6f4bc8daba25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83c5803cc8c05849028a57c4bd4ee72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
您最近一年使用:0次
5 . 如图,为了测量某铁塔的高度,测量人员选取了与该塔底B在同一平面内的两个观测点C与D,现测得
,
,
米,在点C处测得塔顶A的仰角为
,则该铁塔的高度约为( )
(参考数据:
,
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6490a6bc6eb44760814dc24b61f482f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02310ee2f3d3cd5800d6789e84ef85ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/046a61da3440850f4615e498d7a74485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9b76e576af793784851c8280d2949da.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a929d0d84e3654f03694adc8d1a326e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28099a02a19419a582bfb6f103fe0a3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f00bb0e73916ab3f9a468cb120e0336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e61d8807c0a78fe3435a877d6e3cef5a.png)
A.40米 | B.44米 |
C.48米 | D.52米 |
您最近一年使用:0次
6 . 已知
,则
的虚部为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72b972452c268e3820315933d0b9f34f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41042207515dd2e8349c805e6aee400.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
7 . 在
中,角
所对的边分别是
,若
,
,且满足条件的三角形有且仅有两个,则a的取值可能为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ebb2603c1da90c22e0abdd5131b0be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7876345264e0dddca5ab09e0ab85e67.png)
A.9 | B.10 | C.11 | D.12 |
您最近一年使用:0次
8 . 若一个圆台的两个底面半径分别为1和2,体积为
,则它的侧面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73cd55c07baebc2605b4314b789494f8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
9 . 在
中,内角
所对的边分别为
,其外接圆的半径为
,且
.
(1)求角
;
(2)若
的角平分线交
于点
,点
在线段
上,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a17faf90bb5569dab60d277d111cb51.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e14d71667c64ab37596ff76207c7a82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4fab6d048598da04733fafe7c114d83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
您最近一年使用:0次
2024-06-03更新
|
1872次组卷
|
3卷引用:四川省南充市嘉陵第一中学2023-2024学年高一下学期第三次月考数学试卷
10 . 记锐角
的内角A,B,C的对边分别为a,b,c.若
,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec69ee77602f3dbff59a6d23d57f9f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
您最近一年使用:0次
2024-05-29更新
|
737次组卷
|
2卷引用:四川省南充市嘉陵第一中学2023-2024学年高一下学期第三次月考数学试卷