A 2D shape could have line symmetry or rotation symmetry ... A square has 4 right angles and 4 equal sides. A rectangle has 4 right angles, but not equal sides. Dawn’s shape could be a square ...

Still others — such as "O" — have rotational symmetry, where no matter how many degrees you rotate it, its appearance is unchanged. These are some examples of symmetry that are easy to ...

This arises from poor symmetry-breaking in silica; although atoms arrange properly in the first shell in both liquids, local rotational symmetry is harder to break in the second shell in silica ...

A 2D shape could have line symmetry or rotation symmetry ... A square has 4 right angles and 4 equal sides. A rectangle has 4 right angles, but not equal sides. Dawn’s shape could be a square ...