The following figure is made of triangles. A quadrilateral with one pair of parallel sides. The base lengths are 4 units and 7 units. The height is 5 units. A dashed line from opposite vertices creates two triangles, labeled A and B. Triangle A has a base of 7 units and a height of 5 units. Triangle B has a base of 4 units and a height of 5 units. AB
