Scale Factor (8.10D)

A square is dilated by a scale factor of 4.3. Which statement is true?

• The perimeter of the new square will be 18.49 times the perimeter of the old square.
• The perimeter of the new square will be 3 times the perimeter of the old square.
• The area of the new square will be 4.3 times the area of the old square.
• The area of the new square will be 18.49 times the area of the old square.

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

What is the scale factor from ΔDEF to ΔABC?

• 1/2

• 7/3

• 2

• 10/3

If your SF = 0.8, what type of dilation is it?

• Reduction

• Enlargement

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

If your SF = 2.5, what type of dilation is it?

• Reduction

• Enlargement

If your SF = $\frac{6}{5}$  , what type of dilation is it?

• Reduction

• Enlargement

What is the formula for scale factor?

• $\frac{new}{old}$

• $\frac{old}{new}$

Tags

CCSS.8.EE.B.6

CCSS.8.G.A.3

CCSS.8.G.A.4

If a shape is dilated by a scale factor of 1/2, what is the resulting perimeter? 

• The new perimeter is 1/2 the original
• The new perimeter is 2 times the original
• The new perimeter is 1/4 the original 
• The new perimeter is 4 times the original

A figure is multiplied by the scale factor 1/4. What will be the change in perimeter?

• The perimeter will be 1/4 the original perimeter.
• The perimeter will be 1/8 the original perimeter.
• The perimeter will be 1/16 the original perimeter

Tags

CCSS.7.G.A.1

A figure is multiplied by the scale factor 1/4. What will be the change in area?

• The area will be 1/4 the original area.
• The area will be 1/8 the original area.
• The area will be 1/16 the original area.

Tags

CCSS.7.G.A.1

A rectangle has a base 4 ft and height of 5 feet. If the figure dilated by a scale factor of 2, what will be true about its area?

• The area is doubled.
• The area is multiplied by 4.
• The area stays the same

Tags

CCSS.7.G.A.1