I want to make a big circle as shown above, so that students can fill up an inequality or equality sign. I tried \fullmoon, but it wasn't big enough. How can I make a big circle?
Best Answer
The MnSymbol package provides a \bigcircle command, however, it is a little smaller than you want. You can use \scalebox from the graphicx to make the circle a little bigger. It is still a little high, so \raisebox can be used to adjust this. Putting this together into a macro:
Another, arguably more flexible, approach is to use tikz to draw the circle. Again, you need to adjust the baseline of the circle, but it is much easier to change the size of the circle and the width of line. It is also very easy to draw other shapes, such as squares, this way. The macro
shows one way of doing it this way to use tikz. (The \TikCircle command takes an optional argument that gives the radius of the circle in milimeters. By default, the radius is 2.5mm so \TikCircle is the same as \TikCircle[2.5].) This produces:
One easy way would be to use TikZ as in the following MWE
\documentclass[a4paper,12pt]{scrartcl}
\usepackage{tikz}
\begin{document}
Some Text \tikz\draw[red,fill=red] (0,0) circle (.5ex); further text
\end{document}
which produces
Where the first red defines the line style of the drawn circle to be red and the fill=red specifies, that its solid red. You could also use black,fill=red to obtain a red circle with a black border. Finally of course the .5ex is the radius of the circle.
Best Answer
The MnSymbol package provides a
\bigcircle
command, however, it is a little smaller than you want. You can use\scalebox
from the graphicx to make the circle a little bigger. It is still a little high, so\raisebox
can be used to adjust this. Putting this together into a macro:produces:
Another, arguably more flexible, approach is to use tikz to draw the circle. Again, you need to adjust the baseline of the circle, but it is much easier to change the size of the circle and the width of line. It is also very easy to draw other shapes, such as squares, this way. The macro
shows one way of doing it this way to use tikz. (The
\TikCircle
command takes an optional argument that gives the radius of the circle in milimeters. By default, the radius is2.5mm
so\TikCircle
is the same as\TikCircle[2.5]
.) This produces:Here is the full code as a minimal working example:
Finally, you probably want to add some space around these symbols. I would treat these as "mathematics operators" and use
\mathop
: