Symmetry
A shape has symmetry when a line folds it into two halves that land exactly on each other, each a mirror image of the other. That line is a line of symmetry, or mirror line. A rectangle has 2, a square 4, a regular polygon as many as it has sides, a circle endlessly many, and most parallelograms none.
Depth 1 · Foundation
You can find a shape's lines of symmetry by folding, tell a mirror line from a line that only cuts a shape into two equal pieces, and count the mirror lines of common shapes.
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- 1
Foundation
You can find a shape's lines of symmetry by folding, tell a mirror line from a line that only cuts a shape into two equal pieces, and count the mirror lines of common shapes.
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