Mathematics For The Elementary School Teacher: Ch.10.2

Front 1

orthocenter

Back 1

the point where that altitudes of a triangle intersect; the three altitudes are concurrent

Front 2

circumcenter

Back 2

where the perpendicular bisectors of the sides of a triangle intersect;the sides are concurrent at that point and the center of a circle containing the vertices.

Front 3

incenter

Back 3

the point marking the intersection of the three bisectors of a triangle; the center of a circle that is tangent to each side of the triangle

Front 4

centroid

Back 4

the point where the three medians of a triangle are concurrent (a.k.a. the balace point or center of gravity)

Front 5

Euler Line

Back 5

The line containing the centroid, orthocenter, and circumcenter; so named in honor of the Swiss mathematician Leonhard Euler, who discovered this relationship.