Write a coordinate proof for the quadrilateral determined by the points A(2, 4), B(4, -1), C(-1, -3), and D(-3, 2).
3. Prove that ABCD is a parallelogram.
Prove that ABCD is a rectangle.
4.
5.
Prove that ABCD is a rhombus.
6.
Prove that ABCD is a square.

Match the following reasons with the statements given to create the proof. 1. do = ob, ao = oc sas 2. doc = aob given 3. triangle cod congruent to triangle aob vertical angles are equal. 4. 1 = 2, ab = dc if two sides = and ||, then a parallelogram. 5. ab||dc if alternate interior angles =, then lines parallel. 6. abcd is a parallelogram cpcte