Area of a Parallelogram

Use the coloured dots to change the height, width and 'slantiness' of your parallelogram. Click the green arrow and your parallelogram will appear split into two pieces. Now hit the 'animate' button and see what happens.
What shape is your parallelogram changed into? Is the area of the new shape the same as the area of your parallelogram? Do you know how to find the area of the new shape?