Exploring Scale Factors in Area and Perimeter

What is the scale factor if a rectangle shrinks from a side length of 15 to 5?

• 1/2

• 1/3

• 1/4

• 1/5

Tags

CCSS.7.G.A.1

If the scale factor is less than one, what happens to the shape?

• It stays the same

• It changes shape

• It gets smaller

• It gets larger

Tags

CCSS.8.G.A.3

How do you find the perimeter of a rectangle?

• Multiply all sides

• Add all sides

• Subtract all sides

• Divide all sides

Tags

CCSS.4.MD.A.3

If the dimensions of two similar figures are in the ratio 1:2, what is the ratio of their perimeters?

• 1:4

• 2:3

• 2:1

• 1:2

What is the scale factor if a triangle's side length increases from 11 to 33?

• 5

• 4

• 3

• 2

Tags

CCSS.7.G.A.1

If a figure's perimeter is 52 and it is tripled, what is the new perimeter?

• 260

• 208

• 156

• 104

Tags

CCSS.7.G.A.1

What is the scale factor for areas if the scale factor for dimensions is 4/3?

• 9/16

• 3/4

• 16/9

• 4/3

Tags

CCSS.7.G.A.1

If the dimensions of two similar figures are in the ratio 2:5, what is the ratio of their areas?

• 5:2

• 4:25

• 2:5

• 25:4

What is the area of a rectangle if its dimensions are tripled and the original area is 600 square feet?

• 5400

• 3600

• 2400

• 1800

Tags

CCSS.7.G.A.1

If the area of rectangle E is 15 and the scale factor for areas is 9/16, what is the area of rectangle F?

• 11.25

• 8.44

• 10.31

• 9.38

Tags

CCSS.7.G.A.1