Three vertices of a rectangle have coordinates (–3, 1), (7,1), and (7, –4).
what are the coordinates of the fourth vertex of the rectangle?
a.
(–3, –4)
b.
(–3, –1)
c.
(7, –3)
d.
(7, 4)

The answer is A because a rectangle has sides that go straight down basically -3 there has to be two -3 for x coordinate and two 7 for y coordinate and the missing coordinate also has to line up with the coordinate right next to it so it must have -4 as it's coordinate so basically the coordinate vertically across from it has the same x coordinate and the coordinate horizontal from it has the same y coordinate. So it's (-3,-4)