What is the area of rhombus ABCD? Rhombus A B C D on a coordinate plane with vertex A at negative 1 comma 0, vertex B at 5 comma negative 3, vertex C at negative 1 comma negative 6, and vertex D at negative 7 comma negative 3. Point P is at negative 4.6 comma 1.8. Dashed segments join point P to point D and point P to point A, forming right angle D P A.