- Centroid of triangle
Property: The three medians intersect at one point.
Reference: centroid
- Orthocentre of triangle
Property: The three altitudes intersect at one point.
Reference: orthocentre
- In-centre of triangle
Property: The three angle bisectors intersect at one point.
Reference: in-centre
- Circumcentre of triangle
Property: Three perpendicular bisectors of each sides intersect at one point.
Reference: circumcentre