14. In Transformations:
The mirror line for a reflection does not need to be vertical or horizontal as misconcieved.
o Students can mirror shapes etc using mirror lines of different slopes.
o The use of miras placed in different positions/orientations demonstrates that
mirror lines can be other than vertical or horizontal.
Rotations are not always about the origin as one thinks – they can be about ANY point.
o Practical activities with graph paper and varying centres of rotation can resolve
the misconception.