When Number 4 jumps into Flatland, he becomes a square. Meet the rest of the shapes by counting the sides.

Number 12 sings about the different shapes and arrays that they can become.

Number 6 shows his friends the sides of his dice and the shapes their friends can make.

Monster Math Squad determines how many sides does a triangle, square, and pentagon have.

The straight line competes with the squiggly line to become more fun and win the heart of the perfect circle. The straight line eventually learns how to create angles and complex shapes in order to win over the circle.