Quadrilateral ABCD has vertices at A(-2,1) , B(7,7) , C(3,-1) , and D(-6,-7) . a) Prove that ABCD is a parallelogram.

b) Prove that the diagonals of ABCD are not perpendicular.

Find parametric equations for the line. (enter your answers as a comma-separated list of equations. let x, y, and z be functions of t.) the line in the direction of the vector 5 i + 5 j − 6k and through the point (−4, 4, −2).

What are the exclude value of mn+3m

In the diagram, the ratios of two pairs of corresponding sides are equal to prove that almn - axyz by the sas similarity theorem, it also needs to be shown that x 6 z un z zz un = 2x zləzz lezy