# Study sets matching "geometry vocab avondale geo"

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acute angle

right angle

obtuse angle

adjacent angles

an angle that measures less than 90 degrees

an angle that measures 90 degrees

An angle that measures more than 90 degrees but less than 180…

Two angles that share a common side and have the same vertex

acute angle

an angle that measures less than 90 degrees

right angle

an angle that measures 90 degrees

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…

Geometry

Euclidean Geometry

Undefined terms

Point

word composed of two Greek terms, "geos" meaning earth and "me…

identifies a geometry which Euclid formalized and which was ad…

terms in Euclidean geometry which mathematicians consider only…

one of the undefined terms; it has only position and has no le…

Geometry

word composed of two Greek terms, "geos" meaning earth and "me…

Euclidean Geometry

identifies a geometry which Euclid formalized and which was ad…

Vertical Angles

Supplementary Angles

Right Angle

Complimentary Angles

Formed by 2 intersecting lines or segments. Always congruent.

Two angles that form a line and add up to 180°.

An angle that measures 90°.

Two angles that add up to 90°.

Vertical Angles

Formed by 2 intersecting lines or segments. Always congruent.

Supplementary Angles

Two angles that form a line and add up to 180°.

Collinear

Linear Pair

Supplementary angles

Vertical Angles

Points that lie on the same line

A pair of adjacent angles whose noncommon sides are opposite r…

Two angles whose sum is 180 degrees

A pair of opposite congruent angles formed by intersecting lin…

Collinear

Points that lie on the same line

Linear Pair

A pair of adjacent angles whose noncommon sides are opposite r…

Collinear

Linear Pair

Supplementary angles

Vertical Angles

Points that lie on the same line

A pair of adjacent angles whose noncommon sides are opposite r…

Two angles whose sum is 180 degrees

A pair of opposite congruent angles formed by intersecting lin…

Collinear

Points that lie on the same line

Linear Pair

A pair of adjacent angles whose noncommon sides are opposite r…

Collinear

Linear Pair

Supplementary angles

Complementary angles

Points that lie on the same line

A pair of adjacent angles whose noncommon sides are opposite r…

Two angles whose sum is 180 degrees

Two angles whose sum is 90 degrees

Collinear

Points that lie on the same line

Linear Pair

A pair of adjacent angles whose noncommon sides are opposite r…

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

Midsegment

Median

Altitude

Perpendicular Bisector

a segment joining the midpoints of two sides of a triangle

a segment joining the vertex to the midpoint of the opposite s…

A perpendicular segment from a vertex to the line containing t…

A line that is perpendicular to a segment at its midpoint.

Midsegment

a segment joining the midpoints of two sides of a triangle

Median

a segment joining the vertex to the midpoint of the opposite s…

MIDPOINT

SEGMENT

CONGRUENT SEGMENTS

PARALLEL LINES

The point on a segment exactly halfway between the endpoints o…

Part of the line that consists of two endpoints and all points…

Two segments that are the same size and shape.

Coplanar lines that do not intersect

MIDPOINT

The point on a segment exactly halfway between the endpoints o…

SEGMENT

Part of the line that consists of two endpoints and all points…

parallel lines

skew lines

parallel planes

transversal

coplanar lines that do not intersect

lines that do not intersect and are not coplanar

planes that do not intersect

a lines that intersects two or more coplanar lines at two diff…

parallel lines

coplanar lines that do not intersect

skew lines

lines that do not intersect and are not coplanar

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

Polygon Interior Angles Theorem

Corollary to the Polygon Interior Angle…

Polygon Exterior Angles Theorem

Parallelogram Opposite Sides Theorem

The sum of the measures of the interior angles of a convex n-g…

The sum of the measures of the interior angles of a quadrilate…

The sum of the measures of the exterior angles of a convex pol…

If a quadrilateral is a parallelogram, then its opposite angle…

Polygon Interior Angles Theorem

The sum of the measures of the interior angles of a convex n-g…

Corollary to the Polygon Interior Angle…

The sum of the measures of the interior angles of a quadrilate…

Collinear

Linear Pair

Supplementary angles

Complementary angles

Points that lie on the same line

A pair of adjacent angles whose noncommon sides are opposite r…

Two angles whose sum is 180 degrees

Two angles whose sum is 90 degrees

Collinear

Points that lie on the same line

Linear Pair

A pair of adjacent angles whose noncommon sides are opposite r…

perpendicular bisector

angle bisector

equidistant

concurrent lines

a segment, ray, line, or plane that is perpendicular to a segm…

a ray that divides and angle into two adjacent angles that are…

If a point is on the bisector of an angle, then it is ________…

when three or more lines (or segments, or rays) intersect at t…

perpendicular bisector

a segment, ray, line, or plane that is perpendicular to a segm…

angle bisector

a ray that divides and angle into two adjacent angles that are…

counterexample

postulate

adjacent angles

complementary angles

an example that proves a statement false

an accepted statement of fact

are a pair of angles with a common vertex and a common side, b…

Two angles whose sum is 90 degrees

counterexample

an example that proves a statement false

postulate

an accepted statement of fact

Transformation

Types of Transformation

Pre-Image

Image

Function of mapping that results in change in position, shape,…

Translation ... Reflection ... Rotation ... Dilation

Original image

Figure resulting from transformation of pre-image

Transformation

Function of mapping that results in change in position, shape,…

Types of Transformation

Translation ... Reflection ... Rotation ... Dilation

Midsegment of a Triangle

Median of a Triangle

Concurrent

Point of Concurrency

A segment that connects the midpoints of two sides of the tria…

A segment from a vertex to the midpoint of the opposite side.…

Three or more lines that interest at the same point.

The name of the intersection point of three or more lines.

Midsegment of a Triangle

A segment that connects the midpoints of two sides of the tria…

Median of a Triangle

A segment from a vertex to the midpoint of the opposite side.…

legs

slope angle

law of sines

inverse tangent

the two sides of a right triangle that form the right angle. t…

the acute angle a line forms with the x-axis on a coordinate g…

used to find measurements in non-right triangles using the sin…

the "undo" of the tangent function

legs

the two sides of a right triangle that form the right angle. t…

slope angle

the acute angle a line forms with the x-axis on a coordinate g…

Point

Line

Plane

Collinear points

Has no dimension. A dot represents a point.

a straight path that extends without end in opposite directions

A two-dimensional flat surface that extends in all directions

points that lie on the same line

Point

Has no dimension. A dot represents a point.

Line

a straight path that extends without end in opposite directions

conclusion

converse

contrapositive

law of syllogism

"then" part of a conditional statement

switch the if and then of a conditional (q -> p)

negate and switch the if and then (not q -> not p)

conclusion

"then" part of a conditional statement

converse

switch the if and then of a conditional (q -> p)