Dilation and Scale Factor

If the scale factor is greater than 1, the new figure will be

• an enlargement

• a reduction

• a scale factor

• bigger

What is the scale factor from ΔDEF to ΔABC?

• 2

• 3/2

• 2/3

• 1/2

Dilate the figure by a scale factor of 3 with the origin as the center of dilation. What are the coordinates of the image?

• A'(9,9) B'(18,18) C'(27,9)

• A'(6,6) B'(9,9) C'(12,6)

• A'(0,0) B'(3,3) C'(6,0)

• A'(1,1) B'(2,2) C'(3,1)

If point is at N(-1, 2) and point is at N'(-2, 4), what scale factor was point N multiplied by?

• 2

• 3

• 1/3

• 1/2

If the scale factor is less than one, the new figure will be

• an enlargement

• a reduction

• a scale factor

• bigger

What is the definition of dilations in mathematical terms?

• to make larger or smaller

• to make larger

• none of the above

• to make smaller

A dilation produces a similar figure

• True

• False

If the scale factor is less than 1, the new figure will be

• an enlargement

• a reduction

• a scale factor

• bigger

What variable represents scale factor in the algebraic representation (x,y) to (kx,ky)?

• x

• y

• z

• k

Is this an enlargement or reduction? (blue = original image)

• reduction

• enlargement