24.1 Ratios and Rates p. 532 Introduction: Quick Review Objective: To write ratios and rates and to...
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Transcript of 24.1 Ratios and Rates p. 532 Introduction: Quick Review Objective: To write ratios and rates and to...
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