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# Activity 13-14 Vocab

TermDefinition
Point of Concurency A point where three or more lines intersect
Altitude A segment that connects a vertex of a triangle to the opposite side so that it is perpendicular to that side
Median A segment that connects a vertex of a triangle to the midpoint of the opposite side
Angle Bisector A line, segment, or ray that divides an angle into two congruent parts.
Perpendicular Bisector A line, segment, or ray that divides a segment into two congruent parts and is perpendicular to the segment
Midsegment A segment that joins the midpoints of two sides of a triangle
Centroid The point at which three medians intersect in a triangle
Incenter The point at which three angle bisectors intersect in a triangle
Circumcenter The point at which three perpendicular bisectors intersect in a triangle
Orthocenter The point at which three altitudes intersect in a triangle
Exterior Angle Theorem The sum of the measures of the two remote interior angles is equal to the measure of the exterior angle
Triangle Sum Theorem The sum of the measures of the three interior angles of a triangle is equal to 180 degrees
Isosceles Triangle Theorem If a triangle is isosceles, then the base angles are congruent
Interior Angle An angle formed by two sides of a triangle
Exterior Angle An angle formed by one side of a triangle and the extension of an adjacent side
Remote Interior Angle An interior angle that is not adjacent to a given exterior angle
Isosceles Triangle A triangle with two congruent sides
Centroid Measure Theorem The distance from the centroid to the vertex is twice the distance from the centroid to the Midpoint
Base Angles Angles opposite the congruent sides of an isosceles triangle
Created by: MsClaytonKHS