Given: Midpoint is (-19,-19), endpoint (-18,-11)
so, as shown C is the midpoint of AB
C = ( -19 , -19)
Let one of the endpoint like B = (-18 , -11)
So, it is required to find A
We should know that:
[tex]\begin{gathered} C=\frac{A+B}{2} \\ A+B=2C \\ A=2C-B \\ A=2\cdot(-19,-19)-(-18,-11) \\ A=(-38,-38)-(-18,-11) \\ A=(-38,-38)+(18,11) \\ A=(-20,-27) \end{gathered}[/tex]so, the other end point is (-20, -27)
