Establish the formulas for areas of rectangles, triangles and parallelograms and use these in problem solving
How do you work out the area of a parallelogram? Students are provided with a dynamic representation of a parallelogram which they use to explore the area. By locking the area, students see that infinitely many parallelograms still exist, however they all have the same base and height. Students are then provided with an animation that helps explain their observations.