Archive for March, 2012

Quote

Friday, March 2nd, 2012

I certainly do care about measuring educational results. But what is an ‘educational result?’ The twinkling eyes of my students, together with their heartfelt and beautifully expressed mathematical arguments are all the results I need. – Keith Devlin

What does GeoGebra prove?

Thursday, March 1st, 2012

A tangent touches a circle at B and BD is a diameter of the circle. E and F are points on the tangent. ED intersects the circle at H and FD intersects the circle at J. Prove that EHJF lie on the circumference of a circle.

This was a problem in the textbook for my Year 11 class. Solve it, and do as we did, create a GeoGebra demonstration for the theorem.

If you are a maths teacher you may like to read this.

Quote

Thursday, March 1st, 2012

Mathematicians care no more for logic than logicians for mathematics. - Augustus De Morgan