Symmetry · Grade 5
In Grade 5 you get fluent with: the symmetry of polygons.
A shape has line symmetry if it can be folded so that the two halves match exactly. It has rotational symmetry if it looks the same after a turn of less than 360°. Symmetry appears in logos, flowers, snowflakes and road signs.
Key facts
- Square 4 lines; rectangle 2; rhombus 2; kite 1; parallelogram 0 (but order 2).
- The smallest turn that fits a shape onto itself is 360° ÷ order.