Two-dimensional (2D) shapes are completely flat. They have two dimensions – length and width. A polygon is a closed 2D shape with straight sides that meet at vertices. Polygons can be regular or ...

Researchers captured sound fields around musical triangles. They wanted to understand the physical properties of the triangle instrument, test assumptions about the contribution of the triangle shape, ...

NARRATOR: Hello! This song is all about different types of flat shapes. We see an image of a farm, and then shapes appear above it as the narrator mentions them. NARRATOR: If you look carefully you ...