Quadrilateral ABCDABCDA, B, C, D has the following vertices: A(0,6)A(0,6)A, left parenthesis, 0, comma, 6, right parenthesis B(3,5)B(3,5)B, left parenthesis, 3, comma, 5, right parenthesis C(0,-4)C(0,−4)C, left parenthesis, 0, comma, minus, 4, right parenthesis D(-3,-3)D(−3,−3)D, left parenthesis, minus, 3, comma, minus, 3, right parenthesis Also, \angle A∠Aangle, A is a right angle. Is quadrilateral ABCDABCDA, B, C, D a rectangle, and why? PPPLL HELP