11/25 Warm Up: Scale Factor, Proportions, and Similarity

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Tags

CCSS.7.RP.A.2A

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and then solve for the unknown variable.

Tags

CCSS.7.RP.A.2C

Front

What happens to a figure when the scale factor is greater than one?

Back

The figure undergoes an enlargement.

Tags

CCSS.8.G.A.3

Front

What happens to a figure when the scale factor is less than one?

Back

The figure undergoes a reduction.

Tags

CCSS.8.G.A.3

Front

What is the scale factor?

Back

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

Tags

CCSS.7.G.A.1

Front

If two ratios form a proportion, what can be said about their cross products?

Back

The cross products of the ratios are equal.

Tags

CCSS.7.G.A.1

Front

What is an example of a proportion?

Back

1/2 = 2/4 is an example of a proportion.

Tags

CCSS.7.RP.A.2A

Front

What is the relationship between similar figures and scale factors?

Back

Similar figures have corresponding sides that are proportional, and the ratio of their corresponding sides is the scale factor.

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

Front

How can you determine if two ratios form a proportion?

Back

You can determine if two ratios form a proportion by cross-multiplying and checking if the products are equal.

Tags

CCSS.7.RP.A.2A

Front

What is the significance of a scale factor of 1?

Back

A scale factor of 1 means the figure remains the same size.

Tags

CCSS.7.G.A.1