一、平面和直线

• 平面及方程

<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-1.png" width="500" />
<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-2.png" width="500" />
<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-3.png" width="500" />
<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-4.png" width="500" />
<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-5.png" width="500" />
<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-6.png" width="500" />
<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-7.png" width="500" />
<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-8.png" width="500" />
<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-9.png" width="500" />
<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-10.png" width="500" />

• 直线及方程

<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-11.png" width="500" />
<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-12.png" width="500" />
<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-13.png" width="500" />
<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-14.png" width="500" />
<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-15.png" width="500" />
<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-16.png" width="500" />
<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-17.png" width="500" />

二、简单二次曲面

<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-18.png" width="500" />
<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-19.png" width="500" />
<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-20.png" width="500" />
<img src="https://raw.githubusercontent.com/liangxifeng833/my_program/master/images/math//math-kongjian-jihe-21.png" width="500" />