# draw curved arrow

How can you make my two arrows more like the ones in the photo.

\documentclass[10pt, border=.3cm]{standalone}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\draw (0,0)--(4,1)--(4,7)--(0,6)--(-4,7)--(-4,1)--cycle;
\draw(0,0)--(0,6);
\node (a) at (.715, 6.5) {};
\node (b) at (-.715, 6.5) {};
\draw[->] (a)  to [out=120,in=60] (b);

\draw (9,7)--(13,7)--(12,3.5)--(13,0)--(9,0)--(8,3.5)--cycle;
\draw(12,3.5)--(8,3.5);
\draw(13,7)--(9.175,7.1)--(9.125,7.);
\draw(13,0)--(9.14,-.12)--(9.1,0);

\node (d) at (12.75, 3.8) {};
\node (c) at (12.5, 3.2) {};
\draw[->] (c)  to [out=90,in=90] (d);

\end{tikzpicture}
\end{document}

• How about drawing a semi - circle and then adding -> ? – user31729 Feb 12 '18 at 6:44
• If you have the two end points I'd just do a bezier curve using relative polar coordinates for the two control points – daleif Feb 12 '18 at 8:42

Place the points (c) and (d) with the same separation used in (a) and (b). Use proper values for in and out keywords, and control the "roundness" of the curve with the looseness keyword:

\documentclass[10pt, border=.3cm]{standalone}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\draw (0,0)--(4,1)--(4,7)--(0,6)--(-4,7)--(-4,1)--cycle;
\draw(0,0)--(0,6);
\node (a) at (.715, 6.5) {};
\node (b) at (-.715, 6.5) {};
\draw[->] (a)  to [out=90,in=90, looseness=2] (b);

\draw (9,7)--(13,7)--(12,3.5)--(13,0)--(9,0)--(8,3.5)--cycle;
\draw(12,3.5)--(8,3.5);
\draw(13,7)--(9.175,7.1)--(9.125,7.);
\draw(13,0)--(9.14,-.12)--(9.1,0);

\node (d) at (12.5, 3.5 + .715) {};
\node (c) at (12.5, 3.5 - .715) {};
\draw[->] (c)  to [out=0,in=0,looseness=2] (d);

\end{tikzpicture}
\end{document}


Result: