Determining Similarity

The two right triangles below are similar. What is x, the missing side length in triangle DEF? 

• 3.75

• 9.75

• 10

• 12

Find the missing area. 

• 0

• 12

• 24

• 30

The two parallelograms above are similar.
What is the length in inches of line segment PQ?

• 40 in.

• 34 in.

• 38 in.

• 14 in.

Find the height of the person using what you know about similar triangles.

• 4 ft

• 6.25 ft

• 1.25 ft

• 5.75 ft

What is the scale factor from MNOP to ABCD?

• 2/3

• 3/2

• 2

• 3

The pair of figures is similar. Find the missing side.

• x = 12

• x = 3

• x = 40

• x = 4

What is ratio of any two corresponding sides?

• Scale Factor

• Corresponding Sides

• Similar Figures

All angles in similar figures are congruent.  

• True

• False

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

• a reduction

• an enlargement

• a scale

• not proportional

What is corresponding congruent angles and proportional sides?

• Similar Figures

• Scale Factor

• Congruent Shapes