Centre (mathematics)

This disambiguation page lists articles associated with the same or a similar title.

In mathematics, centre may refer to:

* In an algebraic structure, elements that commute with every element of the structure
* The centre of a group, elements that commute with every group element
* The centre of a ring, elements that commute with every ring element
* The centre of a circle
* The centre of mass, centroid or barycentre of a geometrical figure
* In triangle geometry
* The centroid, intersection of the medians
* The circumcentre, intersection of the perpendicular bisectors of the sides, centre of the circle through the vertices
* The nine-point centre
* The orthocentre, intersection of the altitudes
* The incentre, centre of a circle tangent to the sides
* The excentres, centres of the three circles internally tangent to one side and externally to the other two