24.1Ratios and Rates

p. 532

Introduction: Quick Review Objective: To write ratios and rates and to find unit rates Vocab: 1.ratio = The comparison of two numbers by division 2.equivalent ratios = Ratios that name the same comparisons 3.rate = A ratio that compares two quantities having different units of measure 4.unit rate = A rate that has 1 unit as its second term

Glossary

GlossaryRatio and Equivalent Ratios

Unit Rate

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

24.3Solve Proportions

p. 536

Introduction: Quick Review Objective: to learn how to write and solve proportions

GlossaryProportions

Guided Instruction:Example 1: Solving a proportion• 5 = 50

• 5 x a = 2 x 50

•

•

•

•

Parallelogram Tutorial

24.4Ratios and Similar

Figuresp. 538

Introduction: Quick Review Objective: Learn how to use ratios to identify similar figures

Vocab: 1.corresponding sides= Sides that are in the same position in different plane figures

2.corresponding angles= Angles that are in the same position in different plane figures

Glossary

GlossaryCorresponding Sides and Angles

Guided Instruction:Example 1: Finding the measures of angles and the ratio of lengths of corresponding sides

•MN 12 NP 10 PM 8

• The ratio of the lengths of the corresponding sides is

________. Parallelogram Tutorial

24.5Proportions and Similar

Figuresp. 542

Introduction: Quick Review Objective: Learn how to use proportions and similar figures Vocab: 1.indirect measurement= The technique of using similar figures and proportions to find a measure

Glossary

GlossaryIndirect Measurement

Guided Instruction:Example 1: Finding an unknown length using similar figures and proportion

• 6 = 4

• x =

Parallelogram Tutorial

4 in

6 in

12 in

x

24.6Scale 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

1.scale= The ratio between two sets of measurements

Glossary

GlossaryScale Drawing

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