Dilations and Scale Factor #1

What is the scale factor of a dilation that enlarges a shape by a factor of 3?

• 4

• 3

• 5

• 2

Tags

CCSS.8.G.A.3

If the original dimensions of a rectangle are 4 cm by 6 cm, what are the new dimensions after a dilation with a scale factor of 2?

• 2 cm by 3 cm

• 6 cm by 8 cm

• 10 cm by 14 cm

• 8 cm by 12 cm

Tags

CCSS.8.G.A.3

A triangle has a base of 8 cm and a height of 5 cm. If it is dilated with a scale factor of 0.5, what are the new dimensions?

• The new dimensions of the triangle are a base of 10 cm and a height of 6.25 cm.

• The new dimensions of the triangle are a base of 6 cm and a height of 3.5 cm.

• The new dimensions of the triangle are a base of 2 cm and a height of 1.25 cm.

• The new dimensions of the triangle are a base of 4 cm and a height of 2.5 cm.

Tags

CCSS.8.G.A.3

What is the scale factor of a dilation that reduces a shape by a factor of 0.75?

• 0.25

• 1.25

• 0.5

• 0.75

Tags

CCSS.8.G.A.3

If the original dimensions of a square are 10 cm by 10 cm, what are the new dimensions after a dilation with a scale factor of 1.5?

• 15 cm by 15 cm

• 12.5 cm by 12.5 cm

• 20 cm by 20 cm

• 5 cm by 5 cm

Tags

CCSS.8.G.A.3

A rectangle has a length of 12 cm and a width of 8 cm. If it is dilated with a scale factor of 0.8, what are the new dimensions?

• The new dimensions are 9.6 cm by 6.4 cm.

• The new dimensions are 10.2 cm by 6.8 cm.

• The new dimensions are 8.4 cm by 5.6 cm.

• The new dimensions are 11.5 cm by 7.7 cm.

Tags

CCSS.8.G.A.3

A shape is dilated with a scale factor of 2.5. If the original area of the shape is 36 square units, what is the new area?

• 324

• 144

• 225

• 90

Tags

CCSS.7.G.A.1

If the original perimeter of a square is 20 cm, what is the new perimeter after a dilation with a scale factor of 0.6?

• 12

• 14

• 10

• 8

Tags

CCSS.8.G.A.3

A triangle has a base of 6 cm and a height of 9 cm. If it is dilated with a scale factor of 1.2, what are the new dimensions?

• The new dimensions are 7.2 cm for the base and 10.8 cm for the height.

• The new dimensions are 8.4 cm for the base and 12.6 cm for the height.

• The new dimensions are 6.6 cm for the base and 9.9 cm for the height.

• The new dimensions are 5.4 cm for the base and 8.1 cm for the height.

Tags

CCSS.7.G.A.1

A shape is dilated with a scale factor of 0.4. If the original area of the shape is 64 square units, what is the new area?

• 25.6

• 16

• 6.4

• 10.24

Tags

CCSS.7.G.A.1