What is the area of rhombus abcd ? enter your answer in the box. do not round at any steps. units² rhombus a b c d on a coordinate plane with vertex a at 1 comma 0, vertex b at 7 comma negative 2, vertex c at 1 comma negative 4, and vertex d at negative 5 comma negative 2. point p is at negative 3.8 comma 1.6. dashed segments join point p to point d and point p to point a, forming right angle d p a.