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27 Cards in this Set
 Front
 Back
angle bisector

A ray that starts at the vertex of an angle that divides the angle in to two angles of equal measure


collinear points

Points that lie on the same line.


complementary angles

Two angles whose measures have the sumof 90°


concave polygon

A polygon with one side that angles in


congruent polygons

Two polygons are congruent when the have the same size and same shape


consecutive vertices

"Consecutive: going in order


convex polygon

All the vertices are pointing out


coplanar points

Points that lie on the same plane.


diagonals

A line segment that connects any two nonconsecutive vertices


equiangular polygons

A polygon whose angles are all the same measure


equilateral polygons

A ploygon whose sides are all the same length


line segment

Part of a line with two endpoints.


linear pair of angles

A pair of angles on the same line.


midpoint

A point that is equally distant from the two endpoints


parallel lines

Two or more lines that lie in the same plane and do not intersect


perimeter

"Sum of all the sides


perpendicular lines

Two lines that intersect to form a right angle


point

"The basic unit of geometry. It has no size


polygon

A closed geometric figure


ray

A part of a line that has a beginning but no end


regular polygon

A polygon whose angles and sides are all the same measure


side

Line segment connecting 2 vertices


skew lines

Lines that are not in the same plane and that do not intersect


space

Set of all points.


supplementary angles

Two angles whose measures have the sum of 180°


vertex

Angle of polygon


vertical angles

A pair of angles directly across from each other
