How Many Triangles?
The image is a spinning icosahedron, made using POVRay, it is an animated GIF image. Created by en:User:Cyp and copied from the English Wikipedia. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation;
The animation was adapted from one created by Ramandeep Singh and made available on www.Flashkit.com
Topics: Starter  Shape (3D)
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Photo by Stephen Hardy from Pexels: https://www.pexels.com/photo/loveluckblurbusiness7394683/
Can you sketch a net for an icosahedron?
Have you seen the Great Dodacahedron?
Other shape counting starters:
How Many Squares 1?
 How Many Squares 2?
How Many Triangles 1?

How Many Triangles 2?  How Many Triangles 3?
How Many Rectangles?
 Rectangles Investigation 
Icosahedron 
Mystic Rose
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Teacher, do your students have access to computers such as tablets, iPads or Laptops? This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments: Transum.org/go/?Start=March1 However it would be better to assign one of the student interactive activities below. 

Here is the URL which will take them to a related student activity.
See the National Curriculum page for links to related online activities and resources.