Ratio and Proportion Section 7-1.

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Presentation transcript:

Ratio and Proportion Section 7-1

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

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

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

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

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.