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The **collinear line** created from these three points is called the Euler line.

The **centroid** is always located between the circumcenter and the orthocenter.

A **centroid **is the intersection of the medians of a triangle. A median is a line drawn from the vertex to midpoint of the opposite side.

The **orthocenter** is the intersection of the three altitudes of a triangle.

An altitude is a line drawn from the vertex perpendicular to the opposite side.

The center of a circumscribed circle about a triangle is the **circumcenter**.

It is created from the intersection of the perpendicular bisectors of the triangle.