Geometry Vocabulary - Lines and Triangles

When three or more lines intersect at a common point, the lines are called

• Point of concurrency

• concurrent lines

• centroid

• bisector

_______ (the point where three or more lines intersect with each other)

• Point of Concurrency

• Centroid

• Circumcenter

• Orthocenter

_______ (a line that intersects a line segment at a right angle and divides it into two equal parts)

• Altitude

• Angle Bisector

• Median

• Perpendicular Bisector

_______ (the point of concurrency of the perpendicular bisectors of a triangle)

• Incenter

• Circumcenter

• Centroid

• Orthocenter

Angle Bisector: _______

• a ray, segment, or line that divides a given angle into two angles of equal measures

• a line that intersects a circle at two points

• a segment that connects two points on a circle

• a ray that starts from the center of a circle

_______ (the point of concurrency of the angle bisectors of a triangle)

• Centroid

• Circumcenter

• Incenter

• Orthocenter

_______ (a perpendicular segment from a vertex of a triangle to the opposite side or to a line that contains the opposite side)

• Median

• Base

• Hypotenuse

• Altitude

Orthocenter: _______

• the point of concurrency of the altitudes of a triangle

• the point of concurrency of the medians of a triangle

• the point of concurrency of the angle bisectors of a triangle

• the point of concurrency of the perpendicular bisectors of a triangle

_______ (a line drawn from a vertex of a triangle to the midpoint of the side opposite the vertex)

• Angle Bisector

• Altitude

• Median

• Perpendicular Bisector

_______ (the point of concurrency of the medians of a triangle)

• Orthocenter

• Centroid

• Circumcenter

• Incenter