## 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

### Congruent

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

### 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.

### 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 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