Proportions & Similar Figures Review

Front

What is a proportion?

Back

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

Front

How do you solve a proportion?

Back

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

Front

What is a similar figure?

Back

Similar figures are shapes that have the same shape but may have different sizes; their corresponding angles are equal and their sides are in proportion.

Front

What is the ratio of two quantities?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

Front

If a 12-ounce bottle lasts 16 weeks, how long will an 18-ounce bottle last?

Back

24 weeks.

Front

What is the height of a person if the ratio of their height to a 5-foot object is 5:4?

Back

6.25 ft.

Front

What is the ratio of red apples to green apples if there are 4 red apples and 3 green apples?

Back

4 red apples to 3 green apples.

Front

If 2x = 70, what is the value of x?

Back

35.

Front

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

Back

Use the property that the ratios of corresponding sides are equal.

Front

What is the scale factor in similar figures?

Back

The scale factor is the ratio of the lengths of two corresponding sides of similar figures.