[tex]~~~~~~~~~~~~\textit{middle point of 2 points } \\\\ (\stackrel{x_1}{10}~,~\stackrel{y_1}{9})\qquad (\stackrel{x_2}{1}~,~\stackrel{y_2}{5}) \qquad \left(\cfrac{ x_2 + x_1}{2}~~~ ,~~~ \cfrac{ y_2 + y_1}{2} \right) \\\\\\ \left(\cfrac{ 1 + 10}{2}~~~ ,~~~ \cfrac{ 5 + 9}{2} \right)\implies \left( \cfrac{11}{2}~~,~~\cfrac{14}{2} \right)\implies \left( 5\frac{1}{2}~~,~~7 \right)[/tex]
