The following figure is made of

triangles.
A quadrilateral with one pair of parallel sides. The base lengths are 5 units and 10 units. The height is 3 units. A dashed line from opposite vertices creates two triangles, labeled A and B. Triangle A has a base of 5 units and a height of 3 units. Triangle B has a base of 10 units and a height of 3 units.



A quadrilateral with one pair of parallel sides. The base lengths are 5 units and 10 units. The height is 3 units. A dashed line from opposite vertices creates two triangles, labeled A and B. Triangle A has a base of 5 units and a height of 3 units. Triangle B has a base of 10 units and a height of 3 units.
Find the area of each part of the figure and the whole figure.