This film looks at the surface areas of various quadrilaterals. Clear animations first show the quadrilaterals' different properties such as angles, side lengths and parallelisms. The measuring units square meter and square centimeter are then also introduced. The simple case of the rectangle is used in the following as a starting point for working out the surface areas of more complex quadrilaterals. Animations again demonstrate how parallelograms and trapezes can be broken down into equal rectangles and how a kite can be transformed into a rectangle with exactly double the area.