The circle is probably the simplest among the shapes. It has no vertices, no angles, and all the points on its circumference are equidistant to its center.

Hidden in the simplicity of a circle are its intriguing properties. The circumference of the circle when divided by its diameter is always equal to a single number () even if it is as small as an atom or as big as a planet. And what is more amazing is that the number is a neverending decimal where no portion repeats periodically. Continue reading