The blue point is exactly in the middle of two red points. What are their coordinates?
Now for the advanced student:
Which point is in the middle of the centres of enlargements?
The large red shape is an enlargement of the small red shape.
The large blue shape is an enlargement of the small blue shape.
[One small square represents one unit]
Teacher: Right click the diagram to zoom in.
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Teacher, do your students have access to computers such as tablets, iPads or Laptops? This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments:
However it would be better to assign one of the student interactive activities below.
Here is the URL which will take them to a related student activity.