A circle<span> is a simple closed </span>shape<span> in </span>Euclidean geometry<span>. It is the set of all </span>points<span> in a </span>plane<span> that are at a given distance from a given point, the </span>centre<span>; equivalently it is the curve traced out by a point that moves so that its distance from a given point is </span>constant<span>. The distance between any of the points and the centre is called the </span>radius<span>.
circumference of the circle = 36m x pi = 36pi m</span>
