Ratios, Proportions, and the Geometric Mean

Ratios that have the same value.

• Scale Factor

• Equivalent Ratio

• Corresponding Sides

• Rate

A common ratio for pairs of corresponding sides of similar figures.

• Scale Factor

• Rate

• Scale Drawing

• Cross Products

Figures that have the same shape but different sizes; their sides are proportional, and their corresponding angles are equal.

• Scale Factor

• Similar Figures

• Umit Rate

• Equivalent Ratios

Sides that have the same relative position in geometric figures and are proportional.

• Scale Factor

• Similar Figures

• Scale Drawing

• corresponding sides

A comparison of two numbers by division.

• Rate

• Unit Rate

• Ratio

• Corresponding Sides

In a proportion the numbers diagonally across from each other are multiplied together.

• Cross Products

• Unit Rate

• Rate

• Scale Drawing

The ratio of the size of a figure on a drawing to the actual size of the figure.

• Scale

• Cross Products

• Unit Rate

• Ratio

A ratio of two quantities measured in different units.

• Equivalent Ratios

• Rate

• Corresponding Sides

• Unit Rate

Solve for x

• x=6

• x =1/6

• x = 7

• x=9

Solve for x 

• x = 6

• x = 25

• x = 28

• x = 17