Point B has the coordinates
Eqn of line AB is
Eqn of line AD is
Solving Eqn AB & AD, we get point A.
E is the midpoint of A & C
Slope of BC is same as slope of AD
Eqn of line BC is
Solving line Equations AB & BC, we get point B.
Slope of CD is same as slope of AB
Eqn of line CD is
Solving Eans AD & CD, we get point D