Dilations and Congruent Figures

Which side length corresponds with EF?

• NO

• LM

• OL

• EH

Two objects that are the same shape but NOT the same size are _______.

• Congruent

• Vertical

• Similar

• Complementary

What is the only operation ever used with dilation?

• Addition

• Subtraction

• Multiplication

• Division

The point (8, 12) was dilated to become point (2, 3). What was the scale factor?

• ½
• ¼
• 4
• 2

A dilation always produces a similar figure. Similar figures have the same ______ but different ______. 

• measure; shapes
• sizes; shapes
• value; measures
• shape; sizes

The scaled on a drawing is 3:1. What does this mean?

• The scale drawing is three times the size of the actual object.

• The scale drawing is the same size as the actual object.

• The scale drawing is one-third the size of the actual object.

• The scale drawing is 31 times the size of the actual object.

Suppose that triangle JKL is similar to triangle PQR. Which angle correspond with angle L?

• angle J

• angle K

• angle P

• angle Q

• angle R

Triangle ABC is dilated to produce triangle A'B'C' with scale factor 3/4 . Which describes the relationship between the two triangles?

• Triangle A'B'C' is an enlargement of triangle ABC

• Triangle A'B'C' is a reduction of triangle ABC

• Triangle A'B'C' is a mirror image of triangle ABC

Which must be true of a scale factor of a dilation if the image is smaller that the pre-image?

• The scale factor is positive

• The scale factor is greater than 1

• The scale factor is between 0 and 1

• The scale factor is negative

Dilations only enlarge figures.

• True
• False