What is the missing coordinate that would make the following shape a rectangle? (4,8),(12,8),(12,16)?

Question

What is the missing coordinate that would make the following shape a rectangle? (4,8),(12,8),(12,16)?
Edit

Damon · Answer

we need something else with y = 16 and with x = 4 so (4,16) DRAW IT !!!!!!!!

Anonymous · Answer

Is (7,9) correct?

frank · Answer

Two of the vertices of a rectangle are (1, -6) and (-8, -6). If the rectangle has a perimeter of 26 units, what are the coordinates of its other two vertices?