A two-dimensional or 2D shape is made up of lines. Sometimes the lines are curved and sometimes the lines are straight. The lines all join up to make shapes like these. When the lines join to make ...

Shapes with 3 sides Explore shapes with 3 sides and look at curved and straight lines. Shapes with 4 sides Explore four-sided shapes looking at straight lines, curved lines and 2D shapes.

The landscape changes as lines take shape to form simple geometric designs: trapezoids, straight lines, rectangles, triangles, and swirls. Some of the swirls and zigzags start to form more ...