For two points $A(x_1,y_1)$ and $B(x_2,y_2)$, the coordinates of the mid-point of $AB$ are
\begin{equation*}
\left( \frac{x_1+x_2}{2}, \frac{y_1+y_2}{2} \right).
\end{equation*}
Resources for HKDSE Mathematics
Resources for HKDSE Mathematics
For two points $A(x_1,y_1)$ and $B(x_2,y_2)$, the coordinates of the mid-point of $AB$ are
\begin{equation*}
\left( \frac{x_1+x_2}{2}, \frac{y_1+y_2}{2} \right).
\end{equation*}
