Area of a Trapezoid

To compute the area of a trapezoid, remember that a trapezoid

is just the union of a rectangle and a triangle.

The area of the rectangle is ba, and the area of the triangle is b(c-a)/2. So the area of the trapezoid is ba + b(c-a)/2, or b(c+a)/2.

Last modified: Wed Nov 29 12:08:21 1995