Scale Factor

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

• The figure will be enlarged in size.

• The figure will be reduced in size.

• The figure will remain the same size.

• The figure will be flipped upside down.

What is the scale factor from a square with a side length of 2 to a square with a side length of 4?

• 1

• 2

• 3

• 4

How do you calculate the height of a scale drawing?

• Multiply the actual height by the scale factor.

• Add the actual height to the scale factor.

• Divide the actual height by the scale factor.

• Subtract the scale factor from the actual height.

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

• The figure will be enlarged.

• The figure will be reduced.

• The figure will remain the same size.

• The figure will be flipped.

If a triangle has sides of 3, 4, and 5, and is scaled by a factor of 2, what are the new side lengths?

• 6, 8, and 10

• 5, 10, and 15

• 4, 6, and 8

• 3, 6, and 9

What is the scale factor if a drawing of a building is 30 inches tall and the actual building is 300 feet tall?

• 1 inch : 5 feet

• 1 inch : 10 feet

• 1 inch : 15 feet

• 1 inch : 20 feet

What is the scale factor if a figure is enlarged from 5 inches to 15 inches?

• 1

• 2

• 3

• 4

If a scale factor is 1:10, what does it mean?

• It means that 1 unit on the drawing represents 10 units in real life.

• It means that 10 units on the drawing represent 1 unit in real life.

• It means that 1 unit on the drawing represents 1 unit in real life.

• It means that the drawing is 10 times larger than the real object.

How do you find the missing side length in similar triangles?

• Use the ratio of the corresponding sides to set up a proportion and solve for the missing length.

• Add the lengths of the two known sides to find the missing side.

• Multiply the lengths of the two known sides to find the missing side.

• Subtract the length of the smallest side from the largest side.

What is the relationship between scale factor and area?

• If the scale factor is k, the area of the new figure is k times the area of the original figure.

• If the scale factor is k, the area of the new figure is k² times the area of the original figure.

• If the scale factor is k, the area of the new figure is k³ times the area of the original figure.

• If the scale factor is k, the area of the new figure is the same as the area of the original figure.