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Math Vocabulary 123

Angle Bisector A ray that divides a given angle into two congruent angles, each half the size of the given angle.
Chord A segment whose endpoints are in the circle.
Acute Triangle A triangle with three acute angles
Adjacent Angles Two angles that share a vertex and a side but no points in there interiors.
Circle The set of all points in a plane that are equidistant from a given point, called the center.
Congruent Polygons Have congruent corresponding sides and congruent corresponding angles.
Hexagon A polygon with six sides.
Isosceles Triangle A triangle with at least two congruent sides.
Parallelogram A quadrilateral with both opposite sides parallel.
Pentagon A polygon with five sides.
Perpendicular Bisector A line, segment, or ray that is perpendicular to a segment at its midpoint.
Plane A flat surface that has no thickness and extends without end in the direction of all the lines it contains.
Polygon A closed plane figure with at least three sides.
Ray A part of a line that has exactly one endpoint. The endpoint is named first.
Scalene Triangle A triangle with no congruent sides.
Segment Bisector A line, segment, or ray that separates a segment into two congruent segments.
Trapezoid A quadrilateral with exactly one pair of parallel sides.
Vertex The meeting point of two rays.
Vertical Angles Angles formed by two intersecting lines, and are opposite of each other and are congruent.
Created by: eddie1