1. Ratio and Proportion
Section 7-1

2. Definitions Ratio – comparison between two quantities
5 to :3
Proportion – an equation giving two equal ratios 5 3 5 10 = 3 6

3. Example 1 1.) Ratio of IO to ZD 2.) Ratio of m<I to m<O Z O I D
Write the answer to the following.
1.) Ratio of IO to ZD Z O
120˚
2.) Ratio of m<I to m<O 6b 14
60˚
70˚ D I

4. Example 2
A poster is 1m long and 52cm wide. Find the ratio of the width to the length.

5. Example 3
Two complimentary angles are in the ratio of 4:5. Find the two angles.

6. Example 4
The measures of the three angles of a triangle are in the ratio of 2:2:5. Find the measure of each angle.