Watch the video below which is all about polygons. Polygons are 2D shapes with 3 or more straight sides. All quadrilaterals are polygons, but there are other types of polygons too. As you can see ...

ALL: (singing) All these shapes are everywhere! A square and a rectangle, a circle and a triangle. A square and a rectangle, a circle and a triangle. GIRL 1: A rectangle is like a square ...

For the main trials, half the time the crows were shown sets of quadrilaterals that contained varying degrees of regularity, with each shape set to a random rotation and scale. The crows found it ...

For all Ellenberg’s wit and play (and his rightful admiration of some excellent 19th-century beards), the real work of “Shape” is in codifying that geometry on the page. Ellenberg butters ...

The square-derived tiles are more diverse ... elongated dodecahedron and truncated octahedron. All these shapes are polyhedra with flat faces and straight edges. But 3D shapes with curves can ...