article
Peg and pin boards
This article for teachers suggests activities based on pegboards, from pattern generation to finding all possible triangles, for example.
Triangles
article
Incircles explained
This article is about triangles in which the lengths of the sides and the radii of the inscribed circles are all whole numbers.
article
Liethagoras' theorem
Liethagoras, Pythagoras' cousin (!), was jealous of Pythagoras and came up with his own theorem. Read this article to find out why other mathematicians laughed at him.
article
Interacting with the geometry of the circle
Jennifer Piggott and Charlie Gilderdale describe a free interactive
circular geoboard environment that can lead learners to pose
mathematical questions.
page
Making maths: equilateral triangle folding
Make an equilateral triangle by folding paper and use it to make
patterns of your own.
page
Making maths: test the strength of a triangle
Have you noticed that triangles are used in manmade structures?
Perhaps there is a good reason for this? 'Test a Triangle' and see
how rigid triangles are.
article
Squareo'scope determines the kind of triangle
A description of some experiments in which you can make discoveries about triangles.