# Ch 9 voc

## 18 terms

### image

a new figure produced from the transformation of a figure

### preimage

the original figure in the transformation of a figure

### isometry

a transformation that preserves length and angle measure

### vector

a quantity that has both direction and magnitude, or size

### initial point

the starting point of the vector

### terminal point

ending point of a vector

### horizontal component

describes the left and right direction of a vector

### vertical component

up and down direction of a vector

### component form

combines the vertical and horizontal components

### transformation

Is an operation that moves or changes a geometric
figure in some way to produce a new figure

### image

The new figure produced by a transformation

### translation

Moves every point of a figure the same distance in the same direction

### reflection

Uses a line of reflection to create a mirror image of the original figure

### rotation

Turns a figure about a fixed point, called the center of rotation

### congruence transformation

Transformation changes the position of a figure without changing its size or shape

### matrix

Rectangular arrangement of numbers in rows and columns inside brackets

### element

Each number in a matrix is called an element

### dimensions

The dimensions of a matrix are the number of rows and columns