Review of Similarity

Which of the following describes similar figures?

• Similar figures are figures with the same shape and the same size.
• Similar figures are figures with the same shape but with different sizes.

What happens when a figure is dilated?

• When a figure is dilated, a figure changes shape.
• When a figure is dilated, a figure changes size.

What happens to angle measures when a figure is dilated?

• When a figure is dilated, angle measures change.
• When a figure is dilated, angle measures remain the same

Which statement describes a scaled copy?

• A scaled copy of a figure has the same size and shape as the figure.
• A scaled copy of a figure has the same shape as the figure but is a different size

Which statement describes similar polygons?

• Similar polygons are two polygons with the same shape and same size.
• Similar polygons are two polygons with the same shape, but not the same size.

Which statement describes a scale factor

• A scale factor is a ratio of the scale copy to the original figure.
• A scale factor is a ratio of the scale copy to the original figure written in simplest form.

What happens when the scale factor of a dilation is less than one?

• enlargement
• reduction

What happens when the scale factor of a dilation is greater than one?

• enlargement
• reduction

Which statement best describes a ratio?

• A ratio is a way to compare two numbers.
• A ratio is a way to compare two figures

Which statement best describes a proportion?

• A proportion is two ratios that are set equal to each other.
• A proportion is two lengths that are set equal to each other.