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**Ratio and Equivalent Ratios**

24.1 Ratios and Rates p. 532 Introduction: Quick Review Objective: To write ratios and rates and to find unit rates Vocab: ratio = The comparison of two numbers by division equivalent ratios = Ratios that name the same comparisons rate = A ratio that compares two quantities having different units of measure unit rate = A rate that has 1 unit as its second term Glossary Ratio and Equivalent Ratios Unit Rate Glossary

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**Example 3: Finding the ratio of miles to hours miles/hours = 200/4**

Guided Instruction: Example 3: Finding the ratio of miles to hours miles/hours = 200/4 It will take the Howards ___ hr. to travel ______ mi. Parallelogram Tutorial

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**24.3 Solve Proportions p. 536 Introduction: Quick Review**

Objective: to learn how to write and solve proportions Glossary Proportions

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**Example 1: Solving a proportion 5 = 50 5 x a = 2 x 50**

Guided Instruction: Example 1: Solving a proportion 5 = 50 5 x a = 2 x 50 Parallelogram Tutorial

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**24.4 Ratios and Similar Figures p. 538**

Introduction: Quick Review Objective: Learn how to use ratios to identify similar figures Vocab: corresponding sides= Sides that are in the same position in different plane figures corresponding angles= Angles that are in the same position in different plane figures Glossary Corresponding Sides and Angles Glossary

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**The ratio of the lengths of the corresponding sides is ________.**

Guided Instruction: Example 1: Finding the measures of angles and the ratio of lengths of corresponding sides MN NP PM The ratio of the lengths of the corresponding sides is ________. Parallelogram Tutorial

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**24.5 Proportions and Similar Figures p. 542**

Introduction: Quick Review Objective: Learn how to use proportions and similar figures Vocab: indirect measurement= The technique of using similar figures and proportions to find a measure Glossary Indirect Measurement Glossary

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Guided Instruction: Example 1: Finding an unknown length using similar figures and proportion 6 = 4 x = x 6 in 4 in 12 in Parallelogram Tutorial

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**24.6 Scale Drawings p. 542 Introduction: Quick Review**

Objective: Learn how to use scale to find the dimensions for a drawing or the actual dimensions of an object Vocab: scale drawing= A drawing that shows a real object smaller than (a reduction) or larger than (an enlargement) the real object scale= The ratio between two sets of measurements Glossary Scale Drawing Glossary

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**RECAP: Match the vocab word with its definition**

The technique of using similar figures and proportions to find a measure Sides that are in the same position in different plane figures Angles that are in the same position in different plane figures A rate that has 1 unit as its second term The comparison of two numbers by division Ratios that name the same comparisons A ratio that compares two quantities having different units of measure ratio equivalent ratios rate unit rate corresponding sides corresponding angles indirect measurement scale drawing scale

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