#### Study sets matching "vocab geometry 9"

#### Study sets matching "vocab geometry 9"

Line

Line Segment

Ray

Transversal

a set of points that moves forever in opposite directions ↔

a part of a line that has two end points. ... (Measureable)

a set of points with one end point

a line that intersects (touches) 2 or more lines

Line

a set of points that moves forever in opposite directions ↔

Line Segment

a part of a line that has two end points. ... (Measureable)

ACUTE TRIANGLE... Draw and label an acute…

OBTUSE TRIANGLE... What types of angles a…

RIGHT TRIANGLE... What term(s) describes…

EQUIANGULAR TRIANGLE... Explain why each…

One is obtuse and the other two are acute.

ACUTE and COMPLEMENTARY

The sum of the angles of a triangle is 180 degrees and 180 di…

ACUTE TRIANGLE... Draw and label an acute…

OBTUSE TRIANGLE... What types of angles a…

One is obtuse and the other two are acute.

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

point line plane postulate

Unique line assumption

number line assumption

dimension assumption

1. through any two points there is exactly one line. 2. a lin…

through any two points, there is exactly one line.

every line is a set of points that can be put into a one-to-o…

1) given a line in a plane, there is at least one point in th…

point line plane postulate

1. through any two points there is exactly one line. 2. a lin…

Unique line assumption

through any two points, there is exactly one line.

circle

radius

chord

diameter

a locus of points that are all equidistant from a center point

a line segment that goes from the center of the circle to a p…

a segment whose endpoints are both points on a circle

a chord that passes through the center of the circle

circle

a locus of points that are all equidistant from a center point

radius

a line segment that goes from the center of the circle to a p…

central angle

arc

arc measure

semicircle

an angle whose vertex is on the center of the circle and whos…

a portion of a circle's circumference defined by two endpoints

a measure of an arc defined by the angle measure of its corre…

an arc whose endpoints are on the diameter of the circle

central angle

an angle whose vertex is on the center of the circle and whos…

arc

a portion of a circle's circumference defined by two endpoints

transformation

reflection

line of reflection

isometry

In a pane, a mapping for which each point has exactly one ima…

A transformation representing a flip of the figure over a poi…

A line through a figure that separates the figure into two mi…

A mapping for which the original figure and its image are con…

transformation

In a pane, a mapping for which each point has exactly one ima…

reflection

A transformation representing a flip of the figure over a poi…

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

Cross products

Extremes

Means

Geometric mean

Every proportion has two of these

20/30=2/3 (20 and 3 are these)

20/30=2/3 (30 and 2 are these)

Between 2 positive numbers a & b is the positive number x in…

Cross products

Every proportion has two of these

Extremes

20/30=2/3 (20 and 3 are these)

Ratio

Proportion

Cross Products

Geometric Mean

A comparison of two quantities

An equation that states that two ratios are equal

In a proportion, if a/b=c/d, then a

**d = b**aIn a proportion, If a/b = x/b, the geometric mean ... of a and b…

Ratio

A comparison of two quantities

Proportion

An equation that states that two ratios are equal

Angle of depression

Angle of elevation

Cosine

Geometric mean

the angle that a downward line of sight makes with a horizont…

the angle that an upward line of sight makes with a horizonta…

a trigonometric ration for acute angles that involves the len…

the positive number x that satisfies a/x = x/b So, x^2 = ab a…

Angle of depression

the angle that a downward line of sight makes with a horizont…

Angle of elevation

the angle that an upward line of sight makes with a horizonta…

Line of reflection

Translation vector

Center of rotation

Angle of rotation

Each point of the primage and its corresponding point on the…

A translation is a function that maps each point to its image…

A rotation about a fixed point, through an angle of x degrees

The angle that the preimage was rotated to form the image

Line of reflection

Each point of the primage and its corresponding point on the…

Translation vector

A translation is a function that maps each point to its image…

congruent circles

concentric circles

radius

chord

same diameter

share the same center or axis

the length of a line segment from its center to its perimeter

straight line segment whose endpoints both lie on the circle

congruent circles

same diameter

concentric circles

share the same center or axis

complementary angles

supplementary angles

vertical angles

adjacent angles

either of two angles whose sum is 90°

either of two angles whose sum is 180°.

each of the pairs of opposite angles made by two intersecting…

have a common side and a common vertex (corner point) and don…

complementary angles

either of two angles whose sum is 90°

supplementary angles

either of two angles whose sum is 180°.

Compositions of Transformations

Congruence Transformations/Isometry

Dilation

Glide Reflection

when a second transformation is performed on the image of a f…

transformation in which an original figure and its image are…

a transformation of a figure by reducing or enlarging it with…

composition of a translation followed by a reflection across…

Compositions of Transformations

when a second transformation is performed on the image of a f…

Congruence Transformations/Isometry

transformation in which an original figure and its image are…

Transformation

Rigid or Congruence Transformation

Examples of Rigid Transformation

Non-Rigid or Similarity Transformation

changes the orientation, location, and size of a figure

a transformation where the figure maintains its shape and size

reflection, translation, rotation

a transformation where the figure maintains its shape but not…

Transformation

changes the orientation, location, and size of a figure

Rigid or Congruence Transformation

a transformation where the figure maintains its shape and size

circle

radius

chord

diameter

the set of all points in a plane that are equidistant from a…

a segment whose endpoints are the center of a circle and any…

a segment whose endpoints are on a circle

a chord that contains the center of the circle

circle

the set of all points in a plane that are equidistant from a…

radius

a segment whose endpoints are the center of a circle and any…

circle

radius

chord

diameter

a locus of points that are all equidistant from a center point

a line segment that goes from the center of the circle to a p…

a segment whose endpoints are both points on a circle

a chord that passes through the center of the circle

circle

a locus of points that are all equidistant from a center point

radius

a line segment that goes from the center of the circle to a p…

Transformation

Rigid Transformation

Translation

Rotation

An operation that moves or changes a geometric figure in some…

A transformation that preserves congruence - segment lengths…

Moves every point of a figure the same distance, in the same…

Turns every point of a figure the same angle amount, about th…

Transformation

An operation that moves or changes a geometric figure in some…

Rigid Transformation

A transformation that preserves congruence - segment lengths…

Apothem

Center of a Circle

Center of a regular polygon

Central angle of a regular polygon

perpendicular distance from the center of a regular polygon t…

point inside a circle that is the same distance from every po…

point that is equidistant from all vertices of the regular po…

angle whose vertex is the center of the regular polygon, and…

Apothem

perpendicular distance from the center of a regular polygon t…

Center of a Circle

point inside a circle that is the same distance from every po…