Lines which have
a point in common are said to be concurrent. In geometry, three or
more lines are said to be concurrent if they intersect at a single
point. In a triangle, four basic types of concurrent lines are altitudes,
angle bisectors, medians, and perpendicular bisectors.
- In a triangle, altitudes run from each vertex and meet the
opposite side at right-angles. The point where three altitudes
meet is the orthocenter
- Angle bisectors are rays running from the bisector of each
angle of the triangle. They all meet at the incenter.
- Medians connect the vertexes in a triangle to the midpoint
of the opposite side. They meet at the centroid
- Perpendicular bisectors are lines running out of the midpoint
of each side in a triangle at 90 degree angles. They meet at the