Quadrilateral OVER has vertices. You deduced from this that the diagonals crossed at the origin 00. In fact if all four sides are equal it has to be a.
Slope of Qi slope slope of q - You can conclude that adjacent sides are.
You deduced from this that the diagonals crossed at the origin 00. Slope of CD 2 - 2 6 - 1 0. Then ask the students to measure the angles sides etc. Slope of DA 2 2 1 4 45.