Lesson 32. Symmetry

A shape has a line of symmetry if one side is a reflection of the other along the line. One side folds exactly onto the other along the line.

A shape has rotational symmetry if it fits onto itself when rotated (turned) before it gets back to its starting position.

The shape A fits onto itself three times when rotated through a complete turn. It has rotational symmetry of order three.

If a shape can only fit onto itself in is starting position, it has rotational symmetry of order one.

Test lesson 32

• Test 1
• Test 2
• Test 3