The points A(- 1, 2,- 1), B(2, - 1, 3) and D(- 3, 1,- 3) are 3 vertices of parallelogram ABCD. Find: a) the coordinates of C b) the measure of interior angles  c) the area of the parallelogram

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),…….

The vertices of a quadrilateral are A(9, 4), B(8,-2), C(2,-5), and D(3,-7). Classify the quadrilateral as specifically as possible. Classify the quadrilateral as specifically as possible. O Square Rhombus Rectangle Parallelogram O Trapezoid