Prove that quadrilateral LEAP with the vertices L(-3,1), E(2,6), A(9,5) and P(4,0) is a parallelogram.

Question

Prove that quadrilateral LEAP with the vertices L(-3,1), E(2,6), A(9,5) and P(4,0) is a parallelogram.

Answer 1

Show that LE is parallel to AP, i.e, have the same slope.

And do the same for EA and PL.