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A point is specific location in space with no size or shape
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A line is a straight long narrow mark
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A segment is a line with two end points.
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A ray is a line with one endpoint
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A plane is a surface that continues on forever
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A opposite ray is a two-dimensional flat surface that extends in all directions
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Collinear is points on the same line; points in line
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Coplanar is points of 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 bisector seperates something into two congruent parts
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A midpoint is on a line segment, the point that is halfway between the enpointds
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Congruent is having the same measure
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A vertex is the intersection of two sides of a plane figure
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An acute angle is an angle smaller than 90 degrees
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An obtuse angle is an angle bigger than 90 degrees
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A right angle is an angle that is 90 degrees
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A straight angle is a angle that is 180 degrees
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A complementary angle is angles that equal 90 degrees
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A supplementary angle is angles that equal 180 degrees
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A vertical angle is one of the two opposite and equal angles formed by the intersection of two lines
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Adjacent angles is two angles that have the same vertex and a side in common
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A linear pair is points on a line that are a pair
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Perpendicular lines are lines that intersect at a 90 degree angle
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A polygon is a closed plane figure having three or more straight sides a
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Concave means having at least one interior angle greater than 180 degrees
Convex means having all interior angles less than or equal to 180 degrees
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Regular polygon is a polygon with all sides and all angles equal
Irregular polygon is a polygon with the sides and angles not all equal
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A diagonal is a line extending from one edge of a solid figure to an opposite edge
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A side is one of the surfaces forming the outside of, or one of the lines bounding a geometric figure
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Perimeter is the border or outer boundary of a two-dimensional figure
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