真题
1 . 画出下面V形铁块的三视图(只要画草图).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/8bc76a1f-9399-4746-97e7-9afdbdbfed20.png?resizew=140)
您最近一年使用:0次
2 . 如图,在四棱柱![](https://staticzujuan.xkw.com/quesimg/Upload/formula/740549ec3a3a6af4cbf5c34198516f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf9e28fe522ee7f03a6c24e3803984b4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/b11ab33a-a6be-465e-9307-d31923249dc6.png?resizew=134)
(1)当正视方向与向量
的方向相同时,画出四棱锥
的正视图(要求标出尺寸,并写出演算过程);
(2)若M为PA的中点,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb22cc85336ed6e36ff0d964562a9038.png)
(3)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/740549ec3a3a6af4cbf5c34198516f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf9e28fe522ee7f03a6c24e3803984b4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/b11ab33a-a6be-465e-9307-d31923249dc6.png?resizew=134)
(1)当正视方向与向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d036188ce294e3c7427d0b7d2294fd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(2)若M为PA的中点,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb22cc85336ed6e36ff0d964562a9038.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f2d2ef6661d1808fed0cbd1b0fa53d.png)
您最近一年使用:0次