A directory of useful objects found on the web for teaching Maths.

Browsing by The Australian Curriculum

Use the enlargement transformation to explain similarity and develop the conditions for triangles to be similar (ACMMG220)
* understanding that similarity and congruence help describe relationships between geometrical shapes and form the basis of reasoning and proof
* using the enlargement transformation to establish similarity
* establishing the conditions for similarity of two triangles and comparing this to the conditions for congruence
* using the properties of similarity and ratio, and correct mathematical notation and language, to solve problems involving enlargement (for example scale diagrams)