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21 Cards in this Set

  • Front
  • Back

point

they have no size. In a figure, it is represented by a do. they are named by capital letters.

line

they extend indefinitely and have no thickness or width. In a figure, its shown with arrows at each end. They are usually named by lower case script letters or by writing capital letters for two points on the line, with a double arrow over the pair of lines.

plane

They can be thought of as flat surfaces that extend indefinitely in all directions and have no thickness. In a figure, its often represented by a parallelogram. usually named by a capital script letter or by three non-collinear points.

space

a boundless 3d set of all points

postulate

a statement that describes a fundamental relationship between the basic terms in geometry, they are accepted as true without proof.

theorem

a statement, usually of a general nature, that can be proved by appeal to postulates, definitions, algebraic properties, and rules of logic.

segment bisector

a segment, line, or plane that intersects a segment at its midpoint

mid point

a point M is the _______ of a segment PQ if M is between P and Q, and PM = MQ

perpendicular lines

Two lines that intersect to forma right angle

complementary lines

Two angles whose degree measures have a sum of 90

supplementary lines

Two angles whose degree measures have a sum of 180

adjacent angels

two angles in the same plane that have a common vertex and a common side, but no common interior points

vertical angels

Two nonadjacent angles formed by two intersecting lines.

right angles

An angle whose degree measure is 90

acute angles

An angle whose degree measure is less than 90

obtuse angles

An angle with degree measure greater than 90 and less than 180

linear pair

A pair of adjacent angles whose non common sides are opposite rays.

collinear

points that lie on the same line

non collinear

points that don't lie on the same line

coplanar

points that lie on the same plane

non coplanar

point that don't lie on the same plane