Step 9 Objective

Find the locus of a point that moves according to a given rule, both by reasoning and by using ICT.

Examples of what pupils should know and be able to do

Probing questions

How do you go about finding a locus?

Give me an example of a given rule that you find easy to visualise.

Give me an example that you find more difficult to visualise. What makes it harder?

How does this work relate to your earlier work on construction using compasses?

What if pupils find this a barrier?

Use 'people maths' activities. What locus and what shape are we representing if we all: