You may also like

problem icon

Elastic Maths

How do you write a computer program that creates the illusion of stretching elastic bands between pegs of a Geoboard? The answer contains some surprising mathematics.

problem icon

Plaiting and Braiding

This article for students gives some instructions about how to make some different braids.

problem icon

Celtic Knotwork Patterns

This article for pupils gives an introduction to Celtic knotwork patterns and a feel for how you can draw them.

Witch's Hat

Age 11 to 16 Challenge Level:

Thanks to Cubes, Aisling and Brandon for their ideas on how to make a wizard's hat or a witch's hat.  Cubes suggested cutting out two triangles and sticking them together.  Aisling and Brandon both suggested rolling a piece of paper into a cone.

Either of these methods would work to make a pointy hat.  

But there is a better way to make a conical hat.

Alice worked through this problem and found a very surprising answer. She sent in some work which you can find here.

She only found the tallest wizard's hat, can you do something similar to find the witch's hat, fez or top hat?