12 Using properties of parallelograms, RSTU is a parallelogram that has vertices R (-3, 1), S (3, 4) and T (6, 2). What are the coordinates of point U? -6 R Point U is at (

True or false: The fourth vertex of the parallelogram shown is (a+c, d).

Consider the points A (-2, 2, −3), B (-4, -2, -3), and C (0, 4, 3). Find all the points D so that the points A, B,C, and D (not necessarily in that order) are the vertices of a parallelogram. Enter your answer as a list of points, e.g. (0,0,0), (1,1,1),…….

I need help with this please