Similarity and Scale Factor

What is the scale factor if the triangle on the left is the original?

• 2

• 3/2

• 2/3

• 1/2

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

• a reduction

• an enlargement

• a scale

• not proportional

What is the scale factor from ΔDEF to ΔABC?

• 1/2

• 7/3

• 2

• 10/3

The distance between two cities on a map is 4.125 inches.  Find the actual distance if the scale on the map is 2 inches = 40 miles.

• 165 miles

• 50 miles

• 82.5 miles

• 41.25 miles

If the original is 12 units and the scale factor is 1/4 what is the size of the scale drawing?

• 300

• 4.8

• 3

• 4

What is the value of X?

• x = 2

• x = 3

• x = 6

• x = 7

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

• x = 9

• x = 28

• x = 63

• x = 7

Are the triangles similar?

• Yes

• No

What does similar mean?

• same shape and same size

• same size

• same shape

• neither

What does congruent mean?

• same shape and same size

• same size

• same shape

• neither