Basics of Dilations and Scale Factors Practice

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, a quantity. In dilations, it determines how much larger or smaller a figure becomes.

Front

If the scale factor is less than 1, what type of dilation occurs?

Back

A reduction.

Front

If the scale factor is greater than 1, what type of dilation occurs?

Back

An enlargement.

Front

What is the scale factor in the dilation of a figure that doubles in size?

Back

2.

Front

How do you calculate the actual height of an object from a model using a scale?

Back

Multiply the model measurement by the scale factor.

Front

What is the scale of a model if 1 inch represents 4 feet?

Back

1 in. = 4 ft.

Front

If a model of a flagpole measures 12 inches, how tall is the actual pole?

Back

48 feet.

Front

What is the algebraic expression for a reduction in dilation?

Back

(x, y) → (0.5x, 0.5y).

Front

What happens to the dimensions of a figure when the scale factor is 1?

Back

The figure remains the same size.

Front

What is the effect of a scale factor of 3 on a figure?

Back

The figure is enlarged to three times its original size.