Altitude of a Triangele
a perpendicular segment from a vertex to the line containing the opposite side.
Centroid of a Triangle
the point of concurrency of the three medians of a triangle. also known as the center of gravity.
Circumcenter of a Triangle
the point of concurrency of the three perpendicular bisectors of a triangle.
Circumscribed Circle
every vertex of the polygon lies on the circle.
Concurrent
three or more lines that intersect at one point.
Distance From a Point to a Line
the length of the perpendicular segment from the point to the line.
Equidistant
the same distance from two or more objects.
Incenter of a Triangle
the point of concurrency of the three angle bisectors of a triangle.
Inscribed Circle
a circle in which each side of the polygon is tangent to the circle.
Median of a Triangle
a segment whose endpoints are a vertex of the triangle and the midpoint of the opposite side.
Midsegment of a Triangle
a segment that joins the midpoints of two sides of the triangle.
Orthocenter of a Triangle
the point of concurrency of the three altitudes of a triangle.
Point of Concurrency
a point where three or more lines coincide.