These shapes are all regular polygons. A regular triangle is called an equilateral triangle. A regular quadrilateral is called a square. Irregular polygons are shapes that have sides and angles of ...

The other four faces are all triangles. The shapes with 8 vertices are the cube and the cuboid. The cube has 6 faces all the same, but the cuboid has different faces.

The shape of a structure affects how strong it is. Rectangles, arches, and triangles are the most common shapes used to build big structures. What happens when you push the side of a rectangle?

Explain that size is another property of an object. The objects can also be sorted by shape, according to whether they are a square, triangle, or circle. Explain that shape is also a property of an ...