2 + 2, 4 + 4, 8 + 8 - Addition pattern, 3 × 1, 3 × 2, 3 × 3 - Multiplication pattern, 15 - 3, 12 - 3, 9 - 3 - Subtraction pattern, 9 × 1, 9 × 2, 9 × 3 - Pattern in table of 9, Triangle - One line of symmetry, Circle - Infinite lines of symmetry, 2, 4, 8, 16, 32 - Multiply by 2, Butterfly - Horizontal symmetry, Hexagon - Tiling pattern in a honeycomb, Pentagon - Five lines of symmetry, Reflection symmetry - Flipping across a line, Multiply by 3 at each level - 3, 6, 12, 24, Rectangle tessellation - Seen in brick walls,

9. Patterns and Symmetry

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