Written in stone: the world’s first trigonometry revealed in an ancient Babylonian tablet by Daniel Mansfield and Norman Wildberger

27 08 2017

Read this article for the developing history of trigonometry and Pythagoras’ Theorem.


A Thumbball to Reinforce Trigonometry

26 01 2016

Yesterday I created a Trigonometry Thumbball for a friend. I could only find a ball with a smiley face on it so used that feature to remind the students that Trigonometry is fun.

Here’s the result. I’ve used a plastic ball and written on it using permanent markers of several colours. 


Perspectives of Trigonometry and School Community With Chalk Art Telling Others

30 08 2014

Our last topic for Year 9 was Trigonometry. We called it Perspectives and introduced the topic with a visit from students of the mission teams telling us how the trip had changed their perspective on education and life. We had a curry cooking in the corner for those interested to taste. Food smells invoke creativity and curiosity.
We then started talking about the signs that are projected onto the sporting fields and looked at the Maths involved with the positioning of the camera/projector and so introduced tan. Later we introduced sin and cos and their respective calculations.
As a showcase entry we spent several lessons developing the Maths of perspective drawings of representations of comparisons between Australia and the mission countries- income, death rates, life expectancy etc, and finished by creating chalk drawings around the school for all to see.
Some students were so enthusiastic that they took some chalk home over the weekend to hone their skills for the final production.


Trigonometry in the Classroom

11 08 2012

To introduce Trigonometry we used the lessons from here and built bridges.

There was a prize for the strongest bridge. Some students tested their construction before the official testing.