This figure shows this segment and ray and two lines. Drag the vertices to see how they behave. What is special about the triangle if these 4 objects all lie on a the same line?
Median through A of Triangle ABC
Angle Bisector of Angle BAC, an angle of the triangle
Altitude through A of Triangle ABC
Perpendicular Bisector of Segment BC, a side of the triangle.
Page by James King, 10/2002.