Question

how do you find the another endpoint in a midpoint

Answer 1

\[\text{ Midpoint between endpoint } (x_1,y_1 ) \text{ and other endpoint } (x_2,y_2) \text{ is } (\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})\]

Answer 2

\[(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})\]
just in case it got cut off