Scale Factor on Perimeter and Area

Two hexagons are similar with a scale factor of 4/5. If the area of the larger hexagon is 20, what is the area of the smaller hexagon?

• 10.24

• 12.8

• 16

• 25

The area of triangle A is 54 and triangle B is 150. What is the scale factor of A to B? 

• 9:25

• 27:75

• 3:5

• 25:9

A rectangular garden is 45 ft wide and 70 ft long. On a blueprint, the width is 9 in. Identify the length on the blueprint. 

• 7 in

• 9 in

• 12 in

• 14 in

A figure is dilated by a scale factor of 4. Which of the following statements about the figure must be true?

• The perimeter and area are both multiplied by 4.

• The perimeter is multiplied by 4 and the area is multiplied by 16.

• The perimeter and area are both divided by 4.

• The perimeter is multiplied by 16 and the area is multiplied by 4.

Find the missing perimeter.

• 15

• 20

• 25

• 30

What is the area ratio of the following rectangles?

• 10/7

• 100/49

• 100/36

• 4/36

• 0.25
• 0.5
• 2
• 1/2

What is the scale factor from the small fry to the large fry?

• 1/3

• 48

• 4

• 3

If I know the Area of the smaller rectangle is 12. How do I know the Area of the larger rectangle without knowing all side lengths.

• Multiply smaller Area by SF

• Divide smaller Area by SF

• Multiply smaller Area by SFxSF

• Multiply smaller Area by SFx2

If I know the Perimeter of the smaller rectangle is 16. How do I know the perimeter of the larger rectangle without knowing side lengths.

• Multiply smaller Perimeter by SF

• Divide smaller Perimeter by SF

• Multiply smaller Perimeter by SFxSF

• Multiply smaller Perimeter by SFx2