2D shapes are flat, plane shapes. Triangles have three sides and three angles that add up to 180°. Quadrilaterals have four sides and four angles that add up to 360°. Constructing triangles ...
Explore the properties of 2D shapes from one-sided circles to the eight-sided octagons. Shapes with 3 sides Explore shapes with 3 sides and look at curved and straight lines. Shapes with 4 sides ...