Arcturus, Spica, and Denebola form the easily visible Spring Triangle. The Spring Triangle is best viewed without any equipment. A small telescope reveals the Mini Coathanger. A large telescope is ...

The problem of tiling a plane has fascinated builders and mathematicians alike since time immemorial. At first glance, the task is straightforward: squares, triangles, hexagons all do the trick ...

The beautiful six-fold symmetry of snowflakes is the result of the hydrogen bonds that water molecules form when they freeze. But snowflakes can form other shapes too when the growth of the crystal is ...

Polygons can be regular or irregular in shape. A polygon is a closed 2D shape with at least three sides. A regular polygon is a polygon with all equal sides and angles. An irregular polygon is a ...