Sad Man thinks he's found the perfect pet – a polyhedron. He shows viewers a selection of polyhedrons and introduces a song describing a prism, a hexahedron and an octahedron. In the warm up session the contestants meet Bad Man's challenge and show faces, parallel edges and perpendicular faces on a cube. Following the song 'Yes a very fine pet is a polyhedron', Bad Man goes to a pet shop and upsets the owner by asking for advice on his pet polyhedron. In the Great Hall the final challenge is about the attributes of different 3D shapes. The contestants gain their maths card in spite of Bad Man's trick.

Viewers' Challenge

For each of these shapes: tetrahedron, pentahedron, hexahedron and octahedron, add the number of faces and the number of vertices together. Do they add up to more than the number of edges, less than the number of edges, or are they the same?

Answers

Click on a letter below to choose an answer.

	More
	Less
	The same