Push Rectangle What happens when you push the side of a rectangle? The rectangle is a wobbly, unstable shape. When you push the side, it flops into a slanted parallelogram.

Learn about the area of parallelograms with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

Quadrilaterals Drag the vertices to create different quads. Is it possible to make a square that is not also a rectangle? A diamond that is not also a parallelogram? Why?