2020-04-25 12:44发布
[图]
```
\begin{tikzpicture} \def\mycircleradius{1} \fill (0,0) circle [radius=1pt] coordinate[label=-90:$O$] (O); \draw (O) circle [radius=\mycircleradius]; \foreach \i/\j in {0/B,120/C,180/A} { \fill (\i:\mycircleradius) circle [radius=1pt] coordinate[label=\i:$\j$] (\j); } \fill ($(C)!(A)!($(C)!1!-90:(O)$)$) circle [radius=1pt] coordinate [label=120:$P$](P); \draw (O)--(C)--(P)--(A)--(B);\end{tikzpicture}
这种情况的切线比较容易做。
最多设置5个标签!
```
\begin{tikzpicture}
\def\mycircleradius{1}
\fill (0,0) circle [radius=1pt] coordinate[label=-90:$O$] (O);
\draw (O) circle [radius=\mycircleradius];
\foreach \i/\j in {0/B,120/C,180/A}
{
\fill (\i:\mycircleradius) circle [radius=1pt] coordinate[label=\i:$\j$] (\j);
}
\fill ($(C)!(A)!($(C)!1!-90:(O)$)$) circle [radius=1pt] coordinate [label=120:$P$](P);
\draw (O)--(C)--(P)--(A)--(B);
\end{tikzpicture}
```
这种情况的切线比较容易做。
一周热门 更多>