A point is a specific location in space with no size or shape.

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A line is a never-ending straight path.

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A segment is a Part of a line containing two endpoints and all the points between them.

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A ray is a part of a line that extends indefinitely in one direction from a fixed point.

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A plane is a two-dimensional flat surface that extends in all directions.

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An opposite rays are a two rays that are part of the same line and have only their endpoints in common.  

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A colinear is a three or more points that lie on the same line. 

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A coplaner is a Points or lines that lie in the same plane. 

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An angle is a figure formed by two rays with a common endpoint. 

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A midpoint on a line segment, the point that is halfway between the endpoints.

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A bisector is a ray whose endpoint is the vertex of the angle and is located in the interior of the angle. It separates a given angle into two angles with equal measure.

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A congruent is a having the same measure.

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A vertex is a quadratic function in the form y = a(x - h)² + k, where (h, k) is the vertex of the parabola and x = h is its axis of symmetry.

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An obtuse angle is an angle that measures more than 90° but less than 180°.

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A right angle is an angle that measures exactly 90°.

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A straight angle is an angle that measures 180°.

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A complementary angles is a two angles are complementary if the sum of their measures is 90°. 

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Supplementary angles

A supplementary angles are two angles that are supplementary if the sum of their measures is 180°.

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A vertical angles are opposite angles that formed by the intersection of two lines. 

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Adjacent angles are that have the same vertex, share a common side, and do not overlap.

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 Linear pair is a pair of adjacent angles that form a straight line.

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Perpendicular lines are which meet to form right angles and whose slopes have a product of -1.

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A polygon is a simple closed figure in a plane formed by three or more line segments.

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A concave is a polygon which point on at least one of its diagonals lies outside the polygon. 

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A convex is a polygon which all diagonals are located in the interior of the polygon.

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A regular polygon is a polygon  that has all sides congruent and all angles congruent.

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An irregular polygon is a figure that cannot be classified as a single polygon.

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A diagonal line is a segment joining two nonconsecutive vertices of a polygon.

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A side is the two rays that form an angle. 

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A perimeter is the distance around a closed geometric figure.

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