Scale Factor and Ratio of Areas

The model of a swimming pool has the area of 52 in.  What is the area of the actual pool if the scale factor is 3.5?

• 18.2 inches squared
• 637 inches squared
• 104 inches squared
• 12.25 inches squared

The length of a rectangular prism changes from 6 feet to 18 feet.  What is the scale factor of the change?

• 1/3
• 3
• 2
• .3

A rectangle has dimensions of 3 x 5 inches. The image is created with a scale factor of 1/2. What is the  area of the image?

• .75 square inches
• 3.75 square inches
• 60.0 square inches
• 1.5 square inches

If the length of the pre-image  is 12 units and the scale factor is 1/4 what is the length of the image?

• 300
• 4.8
• 3
• 4

Matching angles are called

• Corresponding Sides
• Corresponding Angles
• The Same
• Congruent Angles

Matching sides are called

• Corresponding Sides
• Corresponding Angles
• The Same
• Congruent Sides

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 less than one, the new figure will be

• an enlargement
• a reduction
• a scale factor
• bigger

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