Use paired minipage environments to align drawings with equations vertically

circle.tex

@@ -9,15 +9,16 @@
 
 \begin{document}
 
+% Minipage environment
+% See https://www.sascha-frank.com/latex-minipage.html
+\begin{minipage}[t][1.8cm][c]{2cm}
 \begin{tikzpicture}
  \draw [thin] circle(0.75cm);
  \filldraw [black] (0,0) circle(1pt);
 \end{tikzpicture}
+\end{minipage}
 
-% Minipage environment
-% See https://www.sascha-frank.com/latex-minipage.html
-
-\begin{minipage}[t][1cm][b]{3.5cm}
+\begin{minipage}[t][1.8cm][c]{3.5cm}
 	\begin{center}
 	 \textbf{Circle}
 	 \end{center}