Dilations

Front

What is the ratio of a length of the new figure to the corresponding length on the original figure?

Back

Scale factor

Front

Dilate Point B (3,2) by a scale factor of 1/2. What are the new coordinates?

Back

(1.5, 1)

Front

What is the definition of dilations in mathematical terms?

Back

To make larger or smaller.

Front

State the coordinate of the image of the given point B (4,9) under a dilation with center at the origin with the given scale factor k = 2.

Back

(8,18)

Front

A triangle has vertices with coordinates (2,0), (3, -1) and (-2,-5). If the triangle is dilated by a scale factor of 3 with the origin as the center of dilation, what are the coordinates of the vertices of the image?

Back

(6,0), (9,-3), (-6,-15)

Front

What is the center of dilation?

Back

The fixed point in a dilation from which all points are expanded or contracted.

Front

If a figure is dilated by a scale factor greater than 1, what happens to the figure?

Back

The figure enlarges.

Front

If a figure is dilated by a scale factor less than 1, what happens to the figure?

Back

The figure reduces in size.

Front

What is the scale factor if a triangle with vertices (1,2), (2,3), and (3,4) is dilated to (2,4), (4,6), and (6,8)?

Back

2

Front

How do you find the image of a point (x,y) under a dilation with center at the origin and scale factor k?

Back

(kx, ky)