The number of lines of symmetry in a regular polygon is equal to the number of sides. A shape has rotational symmetry when it can be rotated and it still looks the same. The order of rotational ...

The number of lines of symmetry in a regular polygon is equal to the number of sides. A shape has rotational symmetry when it can be rotated and it still looks the same. The order of rotational ...

The quasicrystals found in this study form the corners of 20-sided shape called an icosahedron. To prove that he found an icosahedron, Andrew Iams had ...