Icosahedron

A Maths Starter of The Day


How Many Triangles?

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Answer

20

(or 40 if you count the reflection)

As the title suggests, the shape is a regular icosahedron, one of the five Platonic solids. It is a polyhedron composed of 20 triangular faces, with five meeting at each of the 12 vertices connected by 30 edges.

Can you sketch a net for this shape?

 

Have you seen the Great Dodacahedron?

The animation at the top of this page was adapted from one created by Ramandeep Singh and made available on www.Flashkit.com