Scale Factor & Using Scale Factor

If the scale factor is 1:3, what does this mean?

• This means that for every 1 unit of measurement in the smaller figure, there are 3 units in the larger figure.

• This means that the larger figure is 1/3 the size of the smaller figure.

• This means that the two figures are identical in size.

• This means that for every 3 units of measurement in the smaller figure, there is 1 unit in the larger figure.

Tags

CCSS.7.G.A.1

What is a scale factor?

• A scale factor is a number that scales, or multiplies, some quantity.

• A scale factor is a measurement of the area of a shape.

• A scale factor is a term used in calculus to describe limits.

• A scale factor is a ratio that compares the lengths of two different shapes.

Tags

CCSS.7.G.A.1

What is the scale factor from a rectangle with a length of 5 and a width of 3 to a rectangle with a length of 10 and a width of 6?

• 1.5

• 2

• 2.5

• 3

Tags

CCSS.7.G.A.1

What is the scale factor from triangle ABC to triangle DEF if triangle DEF is a reduction of triangle ABC?

• 1

• Greater than 1

• Less than 1

• Equal to 1

Tags

CCSS.7.G.A.1

How can you express a scale factor of 1:4 in decimal form?

• 0.15

• 0.25

• 0.35

• 0.45

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

What happens to a figure if the scale factor is greater than 1?

• The figure remains the same size.

• The new figure will be a reduction.

• The new figure will be an enlargement.

• The figure will become distorted.

Tags

CCSS.8.G.A.3

How do you find the missing side of a shape using a scale factor?

• Add the known side to the scale factor.

• Multiply the known side by the scale factor.

• Subtract the scale factor from the known side.

• Divide the known side by the scale factor.

Tags

CCSS.7.G.A.1

If the scale factor from a small triangle to a large triangle is 3, what is the ratio of their perimeters?

• 1

• 2

• 3

• 4

If a shape is enlarged by a scale factor of 5, what is the new area compared to the original area?

• The new area will be 10 times the original area.

• The new area will be 15 times the original area.

• The new area will be 25 times the original area.

• The new area will be 5 times the original area.

Tags

CCSS.7.G.A.1

What is the scale factor if the dimensions of a shape are reduced to half?

• 1:1

• 1:2

• 2:1

• 1:3

Tags

CCSS.7.G.A.1