MathsLinks

WCYDWT? This image is a great stimulus to build a similar triangle problem. Students could use the internet to find out various dimensions and demonstrate or calculate a missing variable such as: how high was the plane flying. See also http://www.iceinspace.com.au/iotw.html?iotwid=137 and forum for more details. Could load image into GeoGebra for more accurate modelling.

A video tutorial showing how to break apart similar triangle problems using SMART Notebook.

Full scan of Oliver Byrne’s 1847 masterpiece: Euclid’s Elements presented in colour pictogram style proofs (proofs with very few words). Pages can be used to give to students to decipher/explain – or as part of an exploration of the idea and history of mathematical proof. See for example http://www.math.ubc.ca/~cass/Euclid/book1/byrne-4.html