Step 5 Objective
Recognise and visualise the transformation and symmetry of a 2-D shape:
- reflection in given mirror lines and line symmetry;
- rotation about a given point and rotational symmetry.
- Examples of what pupils should
know and be able to do - Probing questions
- What if pupils find
this a barrier?
Probing questions
Make up a reflection or a rotation that is easy to do.
Make up a reflection or a rotation that is hard to do.
What makes it hard?
Sketch me a quadrilateral that has one line of symmetry; or two lines, three lines, no lines, etc. Can you give me any others?
What is the order of rotational symmetry of each of the quadrilaterals you sketched?
What clues do you look for when deciding whether a shape has been formed by reflection or rotation?