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29 Cards in this Set
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 Back
Reasoning that is based on patterns you observe. If you observe a pattern in a sequence, you can use inductive reasoning to tell what the next terms in the sequence will be.

inductive reasoning


A conclusion you reach using inductive reasoning.

conjecture


A particular example or instance of the statement that makes the statement false.

counterexample
Ex. Statement: If the name of a state begins with a W, then that state does not border on an ocean Countrexample: Washington 

Represented by a small dot on a line and is named by a capital letter

Point


Defined as the set of all points.

Space


A series of points that extends in two opposite directions without end.

line


Points that lie on the same line are

collinear points


A flat surface that has no thickness. Contains many lines and extends without end in the directions of all its lines.

plane


Points and lines in the same plane

coplanar


An accepted statment of fact

postulate or axiom


The part of a line consisting of two endpoints and all points between them.

segment


The part of a line consisting of one endpoint and all the points of the line on one side of the endpoint.

ray


Two collinear rays with the same endpoint. They always form a line.

opposite rays


Coplanar lines that do not intersect

parallell lines


Noncoplanar, they are not parallel and do not intersent

skew lines


Two segments with the same length

congruent segments (=)


The point that divides a segment into two congruent segments

midpoint


Formed by two rays with the same endpoint

angle


Angle that is less that 90 degrees

acute angle


Angle that is 90 degrees

right angle


Angle that is less than 180 degrees

obtuse angle


Angle that is 180 degrees

straight angle


Angles with the same measure

congruent angles


A straight edge and a compass to draw a geometric figure.

construction


A geometric tool used to draw circles and parts of circles called arcs.

compass


Two lines that intersect to form rights ancles.

perpendicular lines


A line, segment, or ray that is perpendicular to the segment at its midpoint, therby bisecting the segment into two congruent segments

perpendicular bisector


A ruler with no markings on it.

straight edge


A ray that divides an angle into two congruent coplanar angles.

angle bisector
