# Study sets matching "geometry vocab"

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alpha

angle

arithmetic sequence

clinometer

a Greek letter often used to represent angle measure. Others u…

formed by two rays joined at a common endpoint

an ordered sequence of mathematical terms in which a constant…

a device used to measure angles of elevation and depression

alpha

a Greek letter often used to represent angle measure. Others u…

angle

formed by two rays joined at a common endpoint

alpha

angle

arithmetic sequence

clinometer

a Greek letter often used to represent angle measure. Others u…

formed by two rays joined at a common endpoint

an ordered sequence of mathematical terms in which a constant…

a device used to measure angles of elevation and depression

alpha

a Greek letter often used to represent angle measure. Others u…

angle

formed by two rays joined at a common endpoint

Acute Angle

Adjacent Angles

Angle

Angle Addition Postulate

Angle that measures between 0 and 90 degrees.

Angles which share a side and a vertex.

Is formed by two rays connected with an endpoint.

If S is in the interior of <PQR, then the m<PQS + m<SQR = m<PQ…

Acute Angle

Angle that measures between 0 and 90 degrees.

Adjacent Angles

Angles which share a side and a vertex.

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line segment

congruent segments

point

line

part of a line with two endpoints, labeled with 2 capital lett…

Segments that have the same length (same size and shape)

a location in space, labeled with one capital letter

two points connected extending in both directions with no endp…

line segment

part of a line with two endpoints, labeled with 2 capital lett…

congruent segments

Segments that have the same length (same size and shape)

alternate interior angles

conjecture

line

proof by contradiction

inside the parallel lines, opposite sides of the transversal

An educated guess

A straight, unbroken set of points that goes on forever. It ha…

a form of proof that establishes the truth or validity of a pr…

alternate interior angles

inside the parallel lines, opposite sides of the transversal

conjecture

An educated guess

complementary angles

supplementary angles

vertical angles

linear pair of angles

two angles that add up to 90 degrees

two angles that add up to 180 degrees

angles that are opposite from each other on intersecting lines…

supplementary and adjacent

complementary angles

two angles that add up to 90 degrees

supplementary angles

two angles that add up to 180 degrees

Addition Property of Equality

Subtraction Property of Equality

Multiplication Property of Equality

Division property of Equality

If a=b, then a+c=b+c

If a=b, then a-c=b-c

If a=b, then a times c= b times c

If a=b and c does not equal 0, then a/c = b/c

Addition Property of Equality

If a=b, then a+c=b+c

Subtraction Property of Equality

If a=b, then a-c=b-c

arc length

arc measure

center

central angle

the length of an arc; how far from one point on a circle to an…

the measure in degrees of an arc's central angle

a fixed point from which all points on the circle are equidist…

an angle with its vertex at the center of a circle or polygon

arc length

the length of an arc; how far from one point on a circle to an…

arc measure

the measure in degrees of an arc's central angle

conjecture

Conditional

Converse

Inverse

an educated guess based on presented facts. Remember not all c…

begins wit an "If" statement called a hypothesis and ends wit…

You exchange the the hypothesis and the conclusion. Example: I…

You negate or make both the hypothesis and conclusion invalid…

conjecture

an educated guess based on presented facts. Remember not all c…

Conditional

begins wit an "If" statement called a hypothesis and ends wit…

radius (regular polygon)

polygon

remote interior angles

linear scale factor

a line segment that connects the center of a regular polygon w…

a two-dimensional closed figure of three or more line segments…

when a triangle has an exterior angles, these angles are the t…

the ratio of similarity. the ratio of any pair of correspondin…

radius (regular polygon)

a line segment that connects the center of a regular polygon w…

polygon

a two-dimensional closed figure of three or more line segments…

acute angle

adjacent angles

angle

angle bisector

An angle that measures greater than 0 and less than 90 degrees.

Two angles in the same plane with a common vertex and a common…

A figure formed by two rays with a common endpoint.

A ray that divides an angle into two congruent angles.

acute angle

An angle that measures greater than 0 and less than 90 degrees.

adjacent angles

Two angles in the same plane with a common vertex and a common…

acute angle

angle

area

conjecture

an angle with measure greater than 0 degrees but less than 90…

formed by two rays at a common endpoint; in geometric figures,…

on a flat surface, the number of non-overlapping square units…

an educated guess. often results from noticing a pattern durin…

acute angle

an angle with measure greater than 0 degrees but less than 90…

angle

formed by two rays at a common endpoint; in geometric figures,…

point

line

ray

line segment

a fixed location in space

a figure made up of points that extend forever in both directi…

a figure that has one endpoint and extends forever in the othe…

a piece of a line marked by two endpoints

point

a fixed location in space

line

a figure made up of points that extend forever in both directi…

acute triangle

auxiliary line

base of a triangle

base angle of an isosceles triangle

a triangle with 3 acute angles

a line drawn in a figure to aid in a proof

any side of a triangle

one of the two angles that have the base of the triangle as a…

acute triangle

a triangle with 3 acute angles

auxiliary line

a line drawn in a figure to aid in a proof

arc length

arc measure

center

central angle

the length of an arc

the measure in degrees of an arc's central angle

a fixed point from which all points on the circle are equidist…

an angle with its vertex at the center of a circle or polygon

arc length

the length of an arc

arc measure

the measure in degrees of an arc's central angle

Lines

Planes

Ray

Coplanar

a series of points that extends in two opposite directions wit…

a flat surface with no thickness

is the part of a line consisting of one endpoint and all the p…

points and lines in the same planes

Lines

a series of points that extends in two opposite directions wit…

Planes

a flat surface with no thickness

Linear Pair

Supplementary Angles

Complementary Angles

Vertical Angles

A pair of angles that share a side and a vertex

Two angles that add to 180

Two angles that add to 90

A pair of opposite congruent angles formed by intersecting lin…

Linear Pair

A pair of angles that share a side and a vertex

Supplementary Angles

Two angles that add to 180

Inductive Reasoning

Conjecture

Counterexample

Conditional Statement

It is used to draw a conclusion based on a pattern.

A statement that is believed to be true.

It is an example that proves a conjecture or statement is fals…

A statement written in if then form with a hypothesis and conc…

Inductive Reasoning

It is used to draw a conclusion based on a pattern.

Conjecture

A statement that is believed to be true.

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Perpendicular Lines

Conditional Statement

Converse

Bi-Condtional Statement

Lines that intersect to form right angles

A statement that can be written as an "if...then..." statement

A statement that is formed by switching the hypothesis and con…

When both a conditional statement and its converse are true -…

Perpendicular Lines

Lines that intersect to form right angles

Conditional Statement

A statement that can be written as an "if...then..." statement

line

point

arc

midpoint

a straight one dimensional figure having no thickness and exte…

A zero dimensional object. ... Has no part.

any portion of the circumference of a circle.

The point on a line segment dividing it into 2 congruent parts.

line

a straight one dimensional figure having no thickness and exte…

point

A zero dimensional object. ... Has no part.

Undefined Terms

Point

Line

Plane

Basic figures which cannot be defined by using other figures

An exact location represented by a dot.

A straight path that has no thickness and extends forever

a flat surface that extends forever

Undefined Terms

Basic figures which cannot be defined by using other figures

Point

An exact location represented by a dot.

Parallel Lines

Perpendicular lines

Skew lines

Parallel Planes

Coplanar lines that do not intersect.... Their equations have the…

Lines that intersect at 90 degree angles.... Their slopes have a…

Lines that are not coplanar, not parallel and do not intersect.

Planes that do not intersect

Parallel Lines

Coplanar lines that do not intersect.... Their equations have the…

Perpendicular lines

Lines that intersect at 90 degree angles.... Their slopes have a…