precise location or place on a plane. Usually represented by a dot.\

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A line is a geometrical object that is straight, infinitely long and infinitely thin.

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A segmet is the region between a chord of a circle and its associated arc.

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A ray portion of a line which starts at a point and goes off in a particular direction to infinity

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A plane is a flat surface that is infinitely large and with zero thickness

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Opposite rays are two rays with a common endpoint that point in opposite directions and form a straight line

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Collinear is a set of points that lie in a straight line

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Coplanar is when two points are lying in the same plane

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 An angle is a shape, formed by two lines or rays diverging from a common point (the vertex)

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A midpoint is a point on a line segment that divides it into two equal parts.
The halfway point of a line segment.

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A bisector is the line or line segment that divides the angle into two even parts.

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Congruent means that two anlges or objects have the same size.

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A vertex (plural vertices) is a special kind of point that describes the corners or intersections of geometric shapes.

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Acute angles are angles that are less than 90 degrees.

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Obtuse angles are angles that are more than 90 degrees and less that 180 degrees

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Right angles are angles that have a measure of 90 degrees.

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A straight angle is an angle that is eactly 180 degrees.

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Coplementary angles are two angles that add up to 90 degrees.

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Supplementary angles are two angles that add up to 180 degrees.

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Vertical angles are the angles opposite each other when they cross.

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Adjacent angles are angles that are on the same side or vertex.

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Linear pair means that two angles are adjcent and supplementary.

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Perpendicular lines are lines that intersect at 90 degree angle.

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A polygon is a flat shape consisting of straight lines that are joined to form a closed chain or circuit.

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A triangle is a polygon with three corners or vertices and three sides or edges which are line segments.

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A quadrilateral is a polygon with four sides (or edges) and four vertices or corners.

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A pentagon  is any five sided polygon.

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A hexagon is is a polygon with six edges and six vertices.

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An octagon is an eight sided polygon

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A decagon is any polygon with ten sides and ten angles.

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An n-gon is where n is the number of the polygon's sides, also it could be used to name a polygon.

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The word concave means curving in or hollowed inward.

The word convex means curving out or bulging outward.

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A regular shape solid object has equal sides and equal angles.

An irregular solid object has the same amount of sides, but the lengths and angles are different.

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

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A side is the surface of an object, especially a surface joining a top and bottom.

The perimeter is the total distance around a shape.

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