Similarity in Geometry (Topic 8): Series of lessons, exercises and solutions.

Topic 8 of 20 in the Junior Geometry series begins by showing similar shapes and exploring what similarity means in maths so providing students with a definition and framework with which to work.
Scale factors of enlargement are then explored by way of exemplar as well as teaching different techniques of drawing enlargements: either by using grid squares or using rays (straight lines) and the importance of the centre of enlargement.
Further work demonstrating how to calculate enlargement using scale factors as well as calculating & using ratios leads students to being able to show for themselves that shapes are similar either by being equiangular or tat their sides are in proportion.
The 40 pages of illustrations, exemplars, exercises and solutions are structured sequentially making it ideal for the following: differentiation by outcome with self study in-class, small groups exploring different aspects and 'reporting back' as well as for homework setting.