[tex]\bf \textit{middle point of 2 points }\\ \quad \\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
% (a,b)
C&({{ 0}}\quad ,&{{ -8}})\quad
% (c,d)
D&({{ 3}}\quad ,&{{ 0}})
\end{array}\qquad
% coordinates of midpoint
\left(\cfrac{{{ x_2}} + {{ x_1}}}{2}\quad ,\quad \cfrac{{{ y_2}} + {{ y_1}}}{2} \right)
\\\\\\
\left( \cfrac{3+0}{2}~,~\cfrac{0-8}{2} \right)\implies \left(\frac{3}{2}~,~-4 \right)[/tex]
