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32 Cards in this Set

  • Front
  • Back

point

has no dimension, it is represented by a dot

line

has one dimension, it is represented by a line with two arrowheads, but it extends without end

plane

has two dimensions, it is represented by a shape that looks like a floor or a wall, but it extends without end

intersection

a set of points that two common figures have in common

postulate/axiom

a rule or belief that is accepted without proof

coordinate

the real number that corresponds to a point

distance

the absolute value of the difference of coordinates of A and B

segment addition postulate

if B is between A and C, the AB plus BC is equal to AC

congruent segments

line segments that have the same length

collinear points

points that lie on the same line

coplanar points

points that lie on the same plane

ruler postulate

the points on a line can be matched one-to-one with the real numbers

midpoint

the point that divides the segment into two congruent segments

segment bisector

a point, ray, line, line segment, or plane that intersects the segment at its midpoint

angle

two different rays with the same endpoint


1. acute = 1-89 degrees


2. obtuse = 91-179 degrees


3. straight = 180 degrees


4. right = 90 degrees

congruent angles

angles that have the same measure

angle bisector

ray that divides an angle into two angles that are congruent

protractor postulate

Consider ray OB and a point A on one side of OB. The rays of the form OA can be matched one-to-one with the real numbers from 0 to 180.

complementary angles

sum of their measures is 90 degrees


supplementary angles

sum of their measures is 180 degrees

adjacent angles

two angles that share a common vertex and side, but no common interior points

linear pair

two adjacent angles where their noncommon sides are opposite rays

vertical angles

two angles where their sides form two pairs of opposite rays

polygon

a closed plane figure formed by three or more sides and no two sides with a common endpoint are collinear

vertex

each endpoint of a side of a polygon

convex polygon

no line that contains a side of the polygon contains a point in the interior of the polygon

concave polygon

a nonconvex polygon

n-gon

where n is the number of a polygon's sides, can also be used to name a polygon

equilateral

all sides are congruent

equiangular

all angles in the interior of the polygon

regular polygon

a convex polygon that is both equilateral and equiangular

circumference

pi x diameter, 2 x pi x radius