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What notation represents the name of a segment with endpoints…

What notation represents the length of a segment with endpoin…

What notation represents the name of the line through points…

What notation represents the name of the ray with endpoint A…

−-... AB

What notation represents the name of a segment with endpoints…

AB

What notation represents the length of a segment with endpoin…

Line

Parallel Lines

Perpendicular Lines

Line Segment

A straight set of points that extend forever in opposite dire…

Lines that are always the same distance apart. Parallel lines…

Lines that meet or cross each other to form right angles (90…

A part of a line between TWO endpoints.

Line

A straight set of points that extend forever in opposite dire…

Parallel Lines

Lines that are always the same distance apart. Parallel lines…

Square

Rectangle

Triangle

Circle

A quadrilateral with 4 equal sides and 4 right angles.... Opposi…

A Quadrilateral with 4 sides and 4 right angles.... Opposite sid…

A polygon with 3 sides and 3 angles.

A polygon made with a continuous line which is always the sam…

Square

A quadrilateral with 4 equal sides and 4 right angles.... Opposi…

Rectangle

A Quadrilateral with 4 sides and 4 right angles.... Opposite sid…

acute angle

adjacent angles

complementary angles

obtuse angle

an angle whose measure is less than 90 degrees

two angles that share a common side and vertex but do not sha…

two angles whose sum is 90 degrees

an angle whose measure is greater than 90 degrees (but less t…

acute angle

an angle whose measure is less than 90 degrees

adjacent angles

two angles that share a common side and vertex but do not sha…

segment

ray

plane

line

Part of a line consisting of two points and all the points be…

The part of a line that starts at an end point and extends fo…

Flat surface that has no thickness and extends forever.

Straight path that has no thickness and extends forever.

segment

Part of a line consisting of two points and all the points be…

ray

The part of a line that starts at an end point and extends fo…

Triangle

Equilateral Triangle

Scalene Triangle

Isosceles Triangle

A Polygon with 3 sides. The point of intersection of 2 sides…

A Triangle with 3 congruent sides.

A Triangle with 3 sides that have different lengths.

A Triangle with at least 2 congruent sides.

Triangle

A Polygon with 3 sides. The point of intersection of 2 sides…

Equilateral Triangle

A Triangle with 3 congruent sides.

Undefined Term

Collinear

Plane

Line

a basic figure that is not defined in terms of other figures

points that lie on the same line

a flat surface that has no thickness & extends forever

a straight path that has no thickness & extends forever

Undefined Term

a basic figure that is not defined in terms of other figures

Collinear

points that lie on the same line

alpha

angle

arithmetic sequence

clinometer

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

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…

angle

formed by two rays joined at a common endpoint

legs

slope angle

law of sines

inverse tangent

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

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

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

the "undo" of the tangent function

legs

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

slope angle

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

Linear Pair

Supplementary angles

Complementary angles

Vertical Angles

A pair of adjacent angles whose noncommon sides are opposite…

Two angles whose sum is 180 degrees

Two angles whose sum is 90 degrees

A pair of opposite congruent angles formed by intersecting li…

Linear Pair

A pair of adjacent angles whose noncommon sides are opposite…

Supplementary angles

Two angles whose sum is 180 degrees

angle-angle similarity

angle

congruent

corresponding sides

if two angles of one triangle are congruent to two correspond…

in geometric figures, usually formed by two segments with a c…

exactly the same shape and size

sides in two or more figures that are images of each other wi…

angle-angle similarity

if two angles of one triangle are congruent to two correspond…

angle

in geometric figures, usually formed by two segments with a c…

POINT

RAY

PLANE

ANGLE

A SPECIFIC LOCATION IN SPACE

PART OF A LINE THAT EXTENDS INDEFINITELY IN ONE DIRECTION

A FLAT SURFACE WITH NO BOUNDARIES

FORMED BY 2 RAYS AND A COMMON ENDPOINT

POINT

A SPECIFIC LOCATION IN SPACE

RAY

PART OF A LINE THAT EXTENDS INDEFINITELY IN ONE DIRECTION

geometry

point

plane

collinear points

A major branch of mathematics that deals with shapes, sizes,…

Has no size, length, width, or height. It is represented by a…

Set of points that has infinite length and width but no heigh…

Points that lie on the same line

geometry

A major branch of mathematics that deals with shapes, sizes,…

point

Has no size, length, width, or height. It is represented by a…

Point

Line

Plane

Space

A location; Represented by a dot; Named by capital letters

Made up of points and has no thickness or width; Shown with a…

A flat surface made up of points that has no depth and extend…

A boundless three-dimensional set of all points

Point

A location; Represented by a dot; Named by capital letters

Line

Made up of points and has no thickness or width; Shown with a…

Counterexample

Good Definition has

Parallel Lines

Perpendicular Lines

something that would fit your definition, but is not what you…

classification, differentiation, and can be tested.

exist in the same plane that never meet. We use II to represe…

must meet at a 90° angle. We use ⊥ to represent it.

Counterexample

something that would fit your definition, but is not what you…

Good Definition has

classification, differentiation, and can be tested.

Net Drawing

Isometric Drawing

Orthographic Drawing

Point

A 2-dimensional diagram that can be folded to form a 3-dimens…

A corner view of a 3-dimensional figure.

Shows 3 separate views of a 3-dimensional object: top view, f…

Indicates location and has no size. You can represent a point…

Net Drawing

A 2-dimensional diagram that can be folded to form a 3-dimens…

Isometric Drawing

A corner view of a 3-dimensional figure.

bases

bisect

circle

concentric circles

the congruent parallel polygons that form the "top" and "bott…

to divide into two congruent parts

the set of all points on a flat surface that are the same dis…

circles that have the same center

bases

the congruent parallel polygons that form the "top" and "bott…

bisect

to divide into two congruent parts

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 duri…

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…

alternate exterior angles

alternate interior angles

corresponding angles

parallel lines

Angles that lie outside a pair of lines and on opposite sides…

nonadjacent interior angles that lie on opposite sides of the…

Angles that lie on the same side of the transversal and in co…

lines in a plane that do not intersect

alternate exterior angles

Angles that lie outside a pair of lines and on opposite sides…

alternate interior angles

nonadjacent interior angles that lie on opposite sides of the…

Right Triangle

Acute Triangle

Obtuse Triangle

Scalene Triangle

A triangle with exactly one right angle.

A triangle with all acute angles.

A triangle with exactly one obtuse angle.

A triangle with no congruent sides.

Right Triangle

A triangle with exactly one right angle.

Acute Triangle

A triangle with all acute angles.

Angle

Vertex

Acute Angle

Obtuse Angle

two rays with a common endpoint

the common endpoint of two rays ... that form an angle

An angle whose measure in degrees is between 0 and 90

An angle whose measure in degrees is between 90 and 180

Angle

two rays with a common endpoint

Vertex

the common endpoint of two rays ... that form an angle

Angle

Vertex of an angle

Measure of an angle

Degrees

is formed by two rays that share a common endpoint provided t…

is a the common endpoint of the two rays of an angle.

is the smallest amount of rotation about the vertex between t…

is the unit of measurement for angles.

Angle

is formed by two rays that share a common endpoint provided t…

Vertex of an angle

is a the common endpoint of the two rays of an angle.

Point

Line

Plane

Collinear

location with no size or shape

made up of points with with no thickness or width

a flat surface made up of points that extends indefinitely in…

points that lie on the same line

Point

location with no size or shape

Line

made up of points with with no thickness or width

angle

edge

face

halves

Where two sides on a two-dimensional shape meet.

The line segment where two faces of a three-dimensional shape…

The flat part of a three-dimensional shape.

Two equal parts.

angle

Where two sides on a two-dimensional shape meet.

edge

The line segment where two faces of a three-dimensional shape…

Trapezoid

Isosceles Trapezoid

Kite

Parallelogram

a quadrilateral with exactly one pair of parallel sides.

a quadrilateral with exactly one pair of parallel sides and t…

a quadrilateral with two distinct pairs of consecutive congru…

a quadrilateral with two pairs of parallel sides.

Trapezoid

a quadrilateral with exactly one pair of parallel sides.

Isosceles Trapezoid

a quadrilateral with exactly one pair of parallel sides and t…

acute angle

adjacent angle

angle

angle bisector

an angle with a degree measure less than 90

two angles that lie in the same plane, have a common vertex a…

the intersection of 2 noncollinear rays at a common endpoint.…

a ray that divides an angle into two congruent angles

acute angle

an angle with a degree measure less than 90

adjacent angle

two angles that lie in the same plane, have a common vertex a…

equilateral triangle

isosceles triangle

scalene triangle

equiangular triangle

an equilateral triangle is a triangle in which all three side…

an isosceles triangle is a triangle that has two sides of equ…

A triangle with all sides of different lengths. No sides are…

An equiangular triangle is a triangle where all three interio…

equilateral triangle

an equilateral triangle is a triangle in which all three side…

isosceles triangle

an isosceles triangle is a triangle that has two sides of equ…

Equiangular Polygon

Equilateral Polygon

Quadrilateral

Polygon

a polygon where all the angles have the same measure

a polygon where all the sides have the same measure

a polygon with four sides

a closed figure in a plane, formed by connecting line segment…

Equiangular Polygon

a polygon where all the angles have the same measure

Equilateral Polygon

a polygon where all the sides have the same measure

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,…

Two angles whose sum is 90 degrees

counterexample

an example that proves a statement false

postulate

an accepted statement of fact

Point

Alternate Interior Angles

Angle Bisector

Line

It is undefined. It can be considered as a location. It has n…

For two lines intersected by a transversal, a pair of angles…

A ray that divides one angle into two congruent angles.

It is undefined. A series of points that extend in two direct…

Point

It is undefined. It can be considered as a location. It has n…

Alternate Interior Angles

For two lines intersected by a transversal, a pair of angles…

concurrent lines

altitude of a triangle

orthocenter

equidistant

3 or more intersecting lines

a line segment from the vertex of an angle to the midpoint of…

point of concurrency for the perpendicular bisectors of a tri…

when a point is the same distance from two or more lines

concurrent lines

3 or more intersecting lines

altitude of a triangle

a line segment from the vertex of an angle to the midpoint of…

line

line segment

ray

mid-point

It is an... infinite set of points represented by a... line with tw…

Line segment - A line segment consists... of two endpoints and a…

A ray has one endpoint and... extends without end in one directi…

divides a segment into two... congruent segments

line

It is an... infinite set of points represented by a... line with tw…

line segment

Line segment - A line segment consists... of two endpoints and a…

Parallel Lines

Skew Lines

Parallel Planes

Perpendicular Lines

Lines that do not intersect and are coplanar. Lines that are…

Lines that do not intersect and are not coplanar.

Planes that do not intersect

Lines that intersect at a 90 degree angle

Parallel Lines

Lines that do not intersect and are coplanar. Lines that are…

Skew Lines

Lines that do not intersect and are not coplanar.

ray

point

acute angle

line

a part of a line that starts at one endpoint and extends fore…

An exact location in space

An angle that measures less than 90 degrees

A straight path that extends without end in opposite directions

ray

a part of a line that starts at one endpoint and extends fore…

point

An exact location in space

Circle

Radius

Center

Chord

all points on the same plan that are equidistant from a cente…

a segment connecting the center to a point on the circle.

a point that is equidistant from all other points on a circle.

a segment connecting two points on a circle.

Circle

all points on the same plan that are equidistant from a cente…

Radius

a segment connecting the center to a point on the circle.

undefined term

point

line

plane

Basic figures in geometry that cannot be defined by using oth…

An undefined term in geometry that names a location and has n…

A straight path that has no thickness and extends forever.

A flat surface that has no thickness and extends forever.

undefined term

Basic figures in geometry that cannot be defined by using oth…

point

An undefined term in geometry that names a location and has n…

Equiangular Polygon

Equilateral Polygon

Quadrilateral

Polygon

a polygon where all the angles have the same measure

a polygon where all the sides have the same measure

a polygon with four sides

a closed figure in a plane, formed by connecting line segment…

Equiangular Polygon

a polygon where all the angles have the same measure

Equilateral Polygon

a polygon where all the sides have the same measure

Obtuse

Acute

Right Angle

Point

An angle that measures more than 90 degrees.

An angle that measures less than 90 degrees.

An angle that measures 90 degrees.

A place in space that is often marked by a letter or number.

Obtuse

An angle that measures more than 90 degrees.

Acute

An angle that measures less than 90 degrees.

Acute Angle

Right Angle

Obtuse Angle

Parallel Lines

Angle that is less than 90 degrees

Angle that is exactly 90 degrees

Angle that is greater than 90 degrees

Lines that are the same distance apart and never intersect

Acute Angle

Angle that is less than 90 degrees

Right Angle

Angle that is exactly 90 degrees