We have names for different families of objects. Below is a guide explaining Prisms, Pyramids and Anti-Prisms. Using this guide and your GeoGenius Construction Kit pieces, make as many prisms, pyramids and anti-prisms as you can.

**Prisms**

PRISM is the name given to an object with identical parallel polygon bases and other faces made of parallelograms. If the sides of the prism are made using a rectangle, the prism is called a rectangular prism. The GeoGenius Construction Kit can be used to make rectangular prisms. The four rectangular prisms are called (clockwise from top left):

- triangular-based prism
- square-based prism
- hexagonal-based prism
- pentagonal-based prism

The name of a prism is determined by the name of the shape of the base.

**Pyramids**

PYRAMID is the name given to an object with a polygonal base whose other faces are all triangles which meet at a point called the apex. If the apex of the pyramid is above the centre of the base, the pyramid is called a right pyramid.

The GeoGenius Construction Kit can be used to make right pyramids. The four right pyramids are called (clockwise top left):

- triangular-based pyramid
- square-based pyramid
- hexagonal-based pyramid
- pentagonal-based pyramid

The name of a pyramid is determined by the name of the shape of the base.

**Anti-Prisms**

ANTI-PRISM is the name given to an object with identical parallel polygonal bases joined by an alternating band of triangles. The GeoGenius Construction Kit can be used to make anti-prisms. The four rectangular anti-prisms are called (clockwise from top left):

- triangular-based anti-prism
- square-based anti-prism
- hexagonal-based anti-prism
- pentagonal-based anti-prism

The name of a prism is determined by the name of the shape of the base.