Point: 

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

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A line is never-ending straight path.

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

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A ray is 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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A opposite ray is two rays that are part of the same line and have only their endpoints in common. 

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

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A coplanar are points or lines that lie in the same plane. 

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Angle:

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

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

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A bistector separate something into two congruent parts.

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Congruent:

A congruent is angles having the same measure.

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A vertex is the common endpoint of the rays forming the angle.

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An acute angle is a measure greater than 0° and less than 90°.

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

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An right angle measures exactly 90°.

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A straight angle that measures 180°.

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Complemantary are two angles that sum of their measures is 90°.

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Supplementary Angles are two angles with the sum of their measures is 180°.

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Verticle Angles are opposite angles formed by the intersection of two lines. 

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

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Linear Pairs are two angles that are adjacent and supplemenatry and add up to 180 degrees.

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A polygon is a simple closed figure in a plane formed by three or more line segments. (Triangle, Quadrilatrial, Ocatgon, Decagon, Dodegon, n-gon)

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

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A convex is a polygon for 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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A irregular polygon is a figure that cannot be classified as a single polygon.

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

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A side is one of the lines that make a flat (2 dimensional) shape.

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A perimeter is the distance around a two-dimensional shape.

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