Graphics, Figures & Tables ⇒ Tikz Help

[coachbennett1981]

Good morning,

I have a figure that I will post below and need the symbol for 90 degrees to be at the center between the two radii. Can anyone help?

Code: Select all

\documentclass{article}

\usepackage{tikz}
\usetikzlibrary{positioning}
\usetikzlibrary{calc,through,backgrounds}

\begin{document}

\begin{tikzpicture}[scale=1]
\coordinate [label=left:$B$] (B) at (0,0);
\coordinate [label=right: $C$] (C) at (2,0);
\coordinate [label=below:$A$] (A) at (0,-2);
\filldraw[black,fill=gray] (B)--(C) node[above,pos=0.5] {4 in} arc (360:270:2) -- cycle;
\filldraw [black] (A) circle (1pt);
\filldraw [black] (B) circle (1pt);
\filldraw [black] (C) circle (1pt);
\draw (B) circle (2);
\end{tikzpicture}



\end{document}

[gmedina]

Hi,

...and need the symbol for 90 degrees to be at the center between the two radii. Can anyone help?

Which symbol? Do you mean the square that it's used to indicate ortogonality? If so, you could simply draw it:

Code: Select all

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{positioning}
\usetikzlibrary{calc,through,backgrounds}

\begin{document}

\begin{tikzpicture}[scale=1]
\coordinate [label=left:$B$] (B) at (0,0);
\coordinate [label=right: $C$] (C) at (2,0);
\coordinate [label=below:$A$] (A) at (0,-2);
\filldraw[black,fill=gray] (B)--(C) node[above,pos=0.5] {4 in} arc (360:270:2) -- cycle;
\filldraw [black] (A) circle (1pt);
\filldraw [black] (B) circle (1pt);
\filldraw [black] (C) circle (1pt);
\draw (B) circle (2);
\draw (B) rectangle ($(B)+(0.3,-0.3)$);
\end{tikzpicture}

\end{document}