Recognise reflective symmetry in regular polygons: for example, know that a square has four axes of symmetry and an equilateral triangle has three;
Complete symmetrical patterns with two lines of symmetry at right angles (using squared paper or peg board);
Recognise where a shape will be after reflection in a mirror line parallel to one side (sides not all parallel or perpendicular to the mirror line); Recognise where a shape will be after a translation.
Make and investigate a general statement about familiar numbers or shapes by finding examples that satisfy it.