Similar Figures and Scale Factor Review

Similar Figures and Scale Factor Review

Multiple Choice

All angles in similar figures are congruent.  

• True
• False

Multiple Choice

Line CB corresponds with what line? 

• SR
• PQ
• SP
• RQ

Scale Factor

Scale factor is the number that the side lengths from one figure can be multiplied by to give the corresponding side lengths of the other figure.

It is always a multiplier and NOT a divider.

Enlargement

If an image gets bigger, the scale factor is GREATER than 1.

Reduction

If an image gets smaller, the scale factor is LESS than 1.

Multiple Choice

Determine the scale factor for the similar figures from figure B to A.

• + 10

• x 1/3

• x 3

• + 6

Multiple Choice

Determine the scale factor for the similar figures from figure A to B.

• -6

• x 3

• x 1/3 or x 0.3

• -10

Multiple Choice

If the scale factor is greater than one it’s called

a(n) _____________.

• Enlargement

• Reduction

Fill in the Blank

Determine the scale factor of the following similar figures

from figure C to D. The image may be rotated.

Multiple Choice

Determine the scale factor of the following similar figures

from figure F to G.

• x 5

• x 1/5 or x 0.2

Multiple Choice

Determine the scale factor of the following similar figures

from figure R to S.

• x 2

• x 1/2 or x 0.5

Multiple Choice

Determine the scale factor of the following similar figures

from figure M to N.

• x 3

• x 1/3 or x 0.3

Fill in the Blank

If the rule for a wump is (7x, 7y), what is the scale factor

for the wump?

Multiple Choice

True or False. Similar figures have the same angles and proportional

side lengths for corresponding sides.

• True

• False

Fill in the Blank

Congruent figures always have a scale factor of

_______ .

Fill in the Blank

If the rule for a wump is (¼x, ¼y), what is the scale factor

for the wump?

Multiple Choice

Determine the scale factor of the following similar figures

from figure K to L

• x 1.(666) or x 5/3

• x 3/5 or x 0.6

Multiple Choice

If similar figures have a scale factor of less than one is

called a(n) ________________

• Enlargement

• Reduction

Multiple Choice

Determine the scale factor for the similar figures from

figure S to T.

• x 2.8

• x 0.357