Question

find the coordinates of the missing endpoint c and Ac if B is the midpoint of ac A (-5,4) and B(-1,6)

Answer 1

we have the following:

$\begin{gathered} A(-5,4) \\ B(-1,6) \end{gathered}$

therefore:

$\begin{gathered} C(2\cdot(-5)-(-1),(2\cdot4)-6) \\ C(-10+1,8-6) \\ C(-9,2) \end{gathered}$

therefore, the endpoint is C(-9,2)