Step 7 Objective
Enlarge 2-D shapes, given a centre of enlargement and a positive whole-number scale factor.
- Examples of what pupils should
know and be able to do - Probing questions
- What if pupils find
this a barrier?
What if pupils find this a barrier?
Use dynamic geometry software to show an object and its enlarged image (using positive whole-number scale factors). Move the centre of enlargement and ask pupils to describe what is happening to the image. What stays the same? What changes?
Give pupils examples of enlargements with mistakes in them. Ask them to identify the mistakes and complete a correct enlargement.
Further information is given in TMM from L5: Shape and space pp. 19-23 - Acrobat pdf document (80Kb).