Geometry Honors: Chapter 2 Vocabulary
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| 3 undefined terms | point, plane, line
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| basic unit of geometry; indicates location; infinately small; labek with a capital letter | point
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| straight arrangement of points which is infinate in length; no end points; label with points | line
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| flat surface; infinate length and width | plane
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| statement that explains the meaning of a word; places a word in a large group but identifies its unique characteristics | definations
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| set of all points | space
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| points that lie on the same line | collinear points
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| points that lie on the same plane | coplaner
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| straight arrangemen of points with 2 endpoints; name with 2 endpoints | segment
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| distance between endpoints | length of a segment
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| straight arrangement of points with 1 endpoint; name with endpoint | ray
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| 2 rays that share a common endpoint | angle
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| degree of rotation between the 2 rays, between 0 and 180 degrees | measure of an angle
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| the instrument used to measure an angle | protractor
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| figures that are the same size and the same shape | congruent figures
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| segments that have the same length | congruent segments
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| angles that have the same measure | congruent angles
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| a polygon with 3 sides | triangle
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| "if-then" definition; ex; if a polygon is a triangle- then it has 3 sides | biconditional definition
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| swithes "if then" definitions; ex: if a polygon has 3 sides, then it is a triangle | converse
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| an angle that measures 90 degrees | Right Angle
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| an angle thats measurement is less than 90 degrees and greater thatn o degrees | Acute Angle
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| an angle thats measurement is greater thatn 90 degrees and less than 180 degrees | obtuse angle
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| the point on a segment that is the same distance from each endpoint | midpoint of a segment
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| a ray that begins at the vertex and divides the angle's measure in half | angle bisector
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| coplaner lines that do not intersect | parallel lines
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| lines that intersect to form a 90 degree angle | perpendicular lines
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| 2 angles whose measurements add to 90 degrees | pair of complementary angles
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| two angles whose measurements add to 180 degrees | pair of supplementary angles
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| a pair of intersecting lines that share a common vertex but are non-adjacent | vertical angles
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| a pair of adjacent angles that form a linear pair; they share a common and a common side | Linear pair of angles
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| closed figures; made ip of segments; named by number of sides | polygons
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| # of sides = # of vertices = # of _____ | angles
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| sides of polygons are _______ | segments
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| ________ is a point where 2 sides meet | vertex
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| sum of all sides of a polygon | perimeter
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| in a polygon, consecutive sides share a common____. | vertex
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| In a polygon, consecutive angles share a common ________. | side
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| polygons with corresponding sides and corresponding angles | congruent polygons
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| a segment connecting non-adjacent vertises | diagonal of a polygon
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| polygons whose sides have the same measure | equilateral polygons
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| polygons whose angles have the same measure | equiangular polygons
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| polygon that is both equilateral and equiangular | regular polygon
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| polygon with 3 sides | triangle
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| polygom with 4 sides | quadrilateral
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| polygon with 5 sides | pentagon
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| polygon with 6 sides | hexagon
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| polygon with 7 sides | heptagon
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| polygon with 8 sides | octagon
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| polygon with 9 sides | nonagon
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| polygon with 10 sides | decagon
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| polygon with 11 sides | undecagon
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| polygon with 12 sides | dodecagon
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| triangle with one right angle | right triangle
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| triangle with all 3 angles less tthan 90 degrees | acute triangle
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| triangle with 1 obtuse angle | obtuse angle
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| to have a single point of intersection | concurrent
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| trianle with no equal sides | scalene triangles
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| triangle with at least 2 congruent sides | isosceles
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| angle formed by 2 sides of equal length | vertex angle
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| side opposite a vertex angle | base
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| angles at the endpoint of base | base angle
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| segment from an vertex to the midpoint of opposite side | median
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| segment from a vertex perpendicular to the opposite side | altitude
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| A quadrilateral with 1 pair of opposite parallel | Trapezoids
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| A quadrilateral with 2 pairs of adjacent and congruent sides | Kite
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| Quadrilateras with 2 pairs of opposite sides parallel | Parallelograms
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| An equilateral parallelogram | Rhombus
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| A parallelogram that is eguiangular | Rectangles
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| A regular parallelogram; an equiangular rhombus; an equilateral rectangle | Square
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Created by:
ElizabethI
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