In the following diagram, AIBt is a right-angled triangle with sides 44, 404, and 41.804. The point Wc(48) is the midpoint of the hypotenuse. The line segment Drzw is perpendicular to line segment 7B. The equation of the line segment is unknown. The point M is the intersection of line segment Drzw and the line passing through point (61, murk). The coordinates of point I are unknown. What kinds of triangles are AC, BD, and ACAD? Why?