Geometry Term, Definition, Point, A location in space, represented by a dot., Line, A straight path that extends infinitely in both directions. It is defined by two points on the line., Line Segment, A part of a line that has two endpoints. It is the shortest distance between two points., Ray, A part of a line that has one endpoint and extends infinitely in one direction., Angle, The space between two intersecting lines or line segments, measured in degrees., Triangle, A polygon with three sides and three angles., Quadrilateral, A polygon with four sides and four angles., Square, A quadrilateral with four equal sides and four right angles., Rectangle, A quadrilateral with four right angles. Opposite sides are equal in length., Circle, A round shape with all points on the edge equidistant from the center., Diameter, A line segment that passes through the center of a circle, connecting two points on the edge., Radius, A line segment that connects the center of a circle to any point on the edge. It is half the length of the diameter., Perimeter, The total distance around the outside of a polygon. It is the sum of all the side lengths., Area, The measure of the space enclosed by a two-dimensional shape, usually expressed in square units., Volume, The measure of the space occupied by a three-dimensional shape, usually expressed in cubic units., Parallel Lines, Lines that are always the same distance apart and never intersect., Right Triangle, A triangle with one angle measuring 90 degrees., Congruent, Two shapes that have the same size and shape., Symmetry, A shape or object that can be divided into two identical halves when folded along a line., Polyhedron, A three-dimensional solid with flat faces, straight edges, and sharp corners.

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