Annulus is a Latin word meaning a ring. In mathematics annulus refer to the region between two concentric circles. Real Life examples of annulus are a circular path round a circular region, a circular running track etc. In a pipe or a tube with circular cross sections, the material is contained in the annular Cylinder formed.
|A Circle||A Chord of a Circle||A Sector of a Circle||An Arc of a Circle|
|Area Circle||Center of the Circle||Circle Equations||Circle Segment|
|Circumferance of Circle||Cocentric Circles||Congruent Circle||Part of a Circle|