Ratio and Proportions Geometric

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

A drawing that shows a real object with accurate sizes except they have all been reduced or enlarged by a certain amount (called the scale).

• Cross Prodcuts

• Corresponding Sides

• Unit Rate

• Scale Drawing

Ratios that have the same value.

• Scale Factor

• Equivalent Ratio

• Corresponding Sides

• Rate

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

• Scale

• Cross Products

• Unit Rate

• Ratio

Simplify the Ratio.

81 cm to 3 cm

• 27 cm to 1 cm

• 25 cm to 3 cm

• 20 cm to 2 cm

• 81 cm to 3 cm

Simplify the Ratio

72 ft to 9 ft

• 9 : 72

• 8 : 1

• 36 : 2

• 9 : 1

Simplify the Ratio.

4 ft to 24 in

Hint: units of measure must match

Find the geometric mean between the two numbers.

2 and 18

• 3

• 8

• 6

• 5

Find the geometric mean between the two numbers.

4 and 25

• 23

• 15

• 10

• 1