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60 Cards in this Set
 Front
 Back
Point

No definition


Line

No definition


Plane

no definition


Collinear points

Points that lie on the same line


Coplanar points

Points that lie on the same plane


Space

set of all possible points


Line segment

A set of two points and all the collinear points between them


Ray

Part of a line consisting of a single point and all points on that line that lie on the same side of the original point


Angle

the union of two non collinear rays with a common end point


Right angle

An angle whose measure is 90 degrees


Acute angle

and angle whose measure is less than 90 degrees but more than 0


Obtuse angle

an angle whose measure is more than 90 degrees and less 180


Midpoint of a segment

A point that divides a segment into two equal parts


angle bisector

a line or ray that divides an angle into two equal parts


parallel lines

two or more lines that are coplanar and do not intersect


Skew lines

non coplanar lines


Parallel segments

two segments are parallel if the lines that contain them are parallel


Parallel rays

Two rays are parallel if the lines that contain them are parallel


Perpendicular lines

Lines that intersect to form a right angle


A pair of complementary angles

two angles whose sum is 90 degrees


a pair of supplementary angles

two angles whose sum is 180 degrees


Vertical angles

two adjacent angles formed by to intersecting lines


Linear pair of angles

two adjacent angles whose non common sides form a striaght line


Polygon

a closed geometric figure in a plane, formed by connecting line segments endpoint to endpoint with each segment intersecting exactly two others


concave polygon

one in which there is a line that contains on of the sides but passes through the interior


convex polygon

one that is not concave


Triangle

a 3 sided polygon


quadrilateral

a 4 sided polygon


pentagon

a 5 sided polygon


hexagon

a 6 sided polygon


heptegon

a 7 sided polygon


octagon

an 8 sided polygon


nonagon

a 9 sided polygon


decagon

a 10 sided polygon


undecagon

an 11 sided polygon


dodecagon

a 12 sided polygon


icosagram

a 20 sided polygon


Consecutive verices of a polygon

two vertices that are endpoints of the same side


consective sides of a polygon

two lines that intersect at the same vertex


consecutive angles

two angles whose veritices are the endpoints of a side


adjacent angles

two angles with a common side and a common vertex


Diagonals of a polygon

a line segment connecting two non consecutive vertices


Equilateral polygon

a polygon whose sides are all congruent


Equiangular polygon

a polygon whose angles are all congruent


Regular polygon

A polygon that is equilateral and eqiangular


Right triangle

a triangle that has exactly one right angle


acute triangle

a triangle where all angles are acute


obtuse triangle

a triangle where exactly one angle is obtuse


scalene triangle

a triangle with no congruent sides


Isosceles triangle

a triangle with at least two equal sides


median of a triangle

a line segment with one endpoint at a vertex and the other endpoint at the midpoint of the opposite side


Altitude of a triangle

A line segment from a vertex that is perpendicular to the line containing the opposite side


trapezoid

a quadrilateral with e xactly one set of parallel sides


Isosceles trapezoid

A trapezoid with congruent legs


Kite

A quadrilateral with two distinct sets of consecutive congruent sides


right kite

A kite whose non vertex angles are right angles


parallelogram

a quadrilateral with two sets of parallel sides


Rhombus

An equilateral quadrilateral


Rectangle

an equiangular quadrilateral


Square

a regular quadrilateral
