[tex]\bf ~~~~~~~~~~~~\textit{middle point of 2 points }\\ \quad \\
\begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
% (a,b)
&&(~{{ 3.2}} &,&{{ 2.5}}~)
% (c,d)
&&(~{{ 1.6}} &,&{{ -4.5}}~)
\end{array}\qquad
% coordinates of midpoint
\left(\cfrac{{{ x_2}} + {{ x_1}}}{2}\quad ,\quad \cfrac{{{ y_2}} + {{ y_1}}}{2} \right)
\\\\\\
\left( \cfrac{1.6+3.2}{2}~~,~~\cfrac{-4.5+2.5}{2} \right)\implies \left( \cfrac{4.8}{2}~~,~~\cfrac{-2.0}{2} \right)\implies (2.4~,-1)[/tex]
