Find the area of a triangle quiz. This is an interactive online test on how to find the area of a right triangle. The formula for finding the area of a triangle is the half of the base times the height. When finding the surface area of triangles, pay attention to the value of the sides that are shown on the figure. This quiz contains illustrations of triangles each one having different values for the base and the height. Apply the formula for the area and find the value of the area of each one. This exercise will facilitate revision and make it easy for teachers and parents.