25 terms

Accelerated CCGPS Coordinate Algebra / Analytic Geometry A - Unit 5: Transformations in the Coordinate Plane - Vocabulary Test

Angle

A figure created by two distinct rays that share a common endpoint (also known as a vertex). or or indicate the same angle with vertex B.

Angle of Rotation

The amount of rotation (in degrees) of a figure about a fixed point such as the origin

Bisector

A point, line or line segment that divides a segment or angle into two equal parts

Circle

The set of all points equidistant from a point in a plane

Congruent

Having the same size, shape and measure. indicates that angle A is congruent to angle B

Corresponding angles

Angles that have the same relative position in geometric figures

Corresponding sides

Sides that have the same relative position in geometric figures

Endpoint

The point at each end of a line segment or at the beginning of a ray

Image

The result of a transformation

Intersection

The point at which two or more lines intersect or cross

Isometry

a distance preserving map of a geometric figure to another location using a reflection, rotation or translation. indicates an isometry of the figure M to a new location M'. M and M' remain congruent.

Line

One of the undefined terms of geometry that represents an infinite set of points with no thickness and its length continues in two opposite directions indefinitely. indicates a line that passes through points A and B.

Line segment

A part of a line between two points on the line. indicates the line segment between points A and B.

Parallel lines

Two lines are parallel if they lie in the same plane and do not intersect. indicates that line AB is parallel to line CD.

Perpendicular lines

Two lines are perpendicular if they intersect to form right angles. indicates that line AB is perpendicular to line CD

Point

One of the basic undefined terms of geometry that represents a location. A dot is used to symbolize it and it is thought of as having no length, width or thickness.

Pre-image

A figure before a transformation has taken place

Ray

A part of a line that begins at a point and continues forever in one direction. indicates a ray that begins at point A and continues in the direction of point B indefinitely.

Reflection

A transformation of a figure that creates a mirror image, "flips," over a line.

Reflection Line (or line of reflection)

A line that acts as a mirror so that corresponding points are the same distance from the mirror

Rotation

A transformation that turns a figure about a fixed point through a given angle and a given direction, such as 90 clockwise

Segment

A part of a line between two points on the line. indicates the line segment between points A and B.

Transformation

The mapping, or movement, of all points of a figure in a plane according to a common operation, such as translation, reflection or rotation

Translation

A transformation that slides each point of a figure the same distance in the same direction

Vertex

The location at which two lines, line segments or rays intersect