\begin{minipage}{0.55\textwidth}
  \refstepcounter{minipagecount}
  \noindent{(\theminipagecount)}\quad
  \begin{tikzpicture}[scale=1.0, baseline=(current bounding box.north)]
    \begin{scope}[rotate=<<rotation>>]

      \coordinate (<<vA>>) at (0,0);
      \coordinate (<<vB>>) at (<<base>>,0);
      \coordinate (<<vE>>) at ($(<<vB>>)+(<<rightoffset>>,0)$);  % extend out
      \coordinate (<<vC>>) at ($(<<vB>>)+(<<rightoffset>>,<<height>>)$); % Perpendicular upwards
      \coordinate (<<vD>>) at ($(<<vA>>)+(<<rightoffset>>,<<height>>)$); % Perpendicular upwards

      \draw (<<vA>>)--(<<vB>>)--(<<vC>>)--(<<vD>>)--cycle;
      \draw[dashed] (<<vB>>)--(<<vE>>);
      \draw[dashed] (<<vE>>)--(<<vC>>);

      \pic [draw, -, angle radius=0.2cm] {right angle=<<vB>>--<<vE>>--<<vC>>};

      \draw[>=Straight Barb, postaction={decorate}, decoration={markings, mark=at position 0.5 with {\arrow[scale=1.5]{>>}}}] (<<vA>>)--(<<vB>>);
      \draw[>=Straight Barb, postaction={decorate}, decoration={markings, mark=at position 0.5 with {\arrow[scale=1.5]{>>}}}] (<<vD>>)--(<<vC>>);
      \draw[>=Straight Barb, postaction={decorate}, decoration={markings, mark=at position 0.5 with {\arrow[scale=1.5]{>}}}] (<<vB>>)--(<<vC>>);
      \draw[>=Straight Barb, postaction={decorate}, decoration={markings, mark=at position 0.5 with {\arrow[scale=1.5]{>}}}] (<<vA>>)--(<<vD>>);



      % Vertex LABELS
      % Labels relative to shape geometry
      \node at ($(<<vA>>)+(-0.2,-0.2)$) {<<vA>>};
      \node at ($(<<vB>>)+(0.0,-0.2)$) {<<vB>>};
      \node at ($(<<vE>>)+(0.2,-0.2)$) {<<vE>>};
      \node at ($(<<vC>>)+(0.2,0.2)$) {<<vC>>};
      \node at ($(<<vD>>)+(-0.2,0.2)$) {<<vD>>};


      % dotted/dashed arrows shifted away from edges
      % Horizontal side (A-B), shifted down yshift=0mm,
      \draw[<->, gray]
          ($(<<vA>>) + (0,-0.7cm)$) -- ($(<<vB>>) + (0,-0.7cm)$)
          node[black, midway, fill=white, inner sep=2.5pt] {<<calc_base>>\,cm};

      % Vertical side (D-C), shifted right xshift=0mm,
      \draw[<->, gray]
          ($(<<vE>>)+(0.6,0)$) -- ($(<<vE>> |- <<vC>>)+(0.6,0)$)
          node[black, midway, fill=white, inner sep=2.5pt] {<<calc_height>>\,cm};

    \end{scope}
\end{tikzpicture}
\end{minipage}%
\hfill
\begin{minipage}{.4\textwidth}
  \begin{align*}
    \text{Area} &= \text{bh} \\
    \text{Area} &= <<calc_base_value>> \text{cm} \times <<calc_height_value>> \text{cm}  \\
    \text{Area} &= <<calcarea_value>> \text{cm}^2
  \end{align*}
\end{minipage}