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 Related Terms
 Median of a Triangle:  A segment is a median of a triangle if and only if its endpoints are a vertex of the triangle and the midpoint of the side opposite the vertex.
Triangle: A polygon with three sides.
Perpendicular Bisector: A perpendicular line or segment that passes through the midpoint of a segment.
Vertex of a Polygon: The common endpoint of two line segments that serve as two sides of a polygon.
Midpoint: The point on a line segment that divides it into two equal parts.
Altitude of a Triangle: The perpendicular distance between a vertex of a triangle and the side opposite that vertex. Sometimes called the height of a triangle. Also, sometimes the line segment itself is referred to as the altitude.
Centroid: The point of intersection of the medians of a triangle. Also, the point in a figure or solid which is the balance point, or center of gravity, of the figure or solid.