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Published byDonna Watkins Modified over 2 years ago

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**Demonstrate understanding of area and perimeter formulas by solving multi-step real world problems**

Lesson 3.3:

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**Find the Area and Perimeter Fluency**

Find the perimeter and area

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**Find the Area and Perimeter Fluency**

Find the missing side

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**Guided Instruction Concept Development RDW Process**

Read Read the problem. Highlight or underline important information Draw Draw a picture, tape diagram, number line, a number bond, a table or a chart to illustrate the problem. Show the computation. Write Write an equation. Write a an answer to the question asked in the problem.

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**Guided Instruction Concept Development Problem 1**

The projection screen in the school auditorium is 5 times as long and 5 times as wide as the screen in the library. The screen in the library is 4 feet long with a perimeter of 14 feet. What is the perimeter of the screen in the auditorium?

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**Guided Instruction Concept Development Problem 1**

Solution

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**Guided Instruction Concept Development Problem 2**

The width of David’s tent is 5 feet. The length is twice the width. David’s rectangular air mattress measures 3 feet by 6 feet. If David puts the air mattress in the tent, how many square feet of floor space will be available for the rest of his things?

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**Guided Instruction Concept Development Problem 2**

Solution

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**Guided Instruction Concept Development Problem 3**

Jackson’s bedroom has an area of 90 square feet. The area of his bedroom is 9 times that of his closet. If the closet is 2 feet wide, what is its length?

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**Guided Instruction Concept Development Problem 3**

Solution

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**Guided Instruction Concept Development Problem 4**

The length of a rectangular deck is 4 times its width. If the deck’s perimeter is 30 feet, what is the deck’s area?

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**Guided Instruction Concept Development Problem 4**

Solution 1

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**Guided Instruction Concept Development Problem 4**

Solution 4

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Exit Ticket Solve the following problem. Use pictures, words, or diagrams to help you solve. 1. A poster is 3 times as long as it is wide. A banner is 5 times as long as it is wide. Both the banner and the poster have perimeters of 24 inches. What are the length and width of the poster and the banner?

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Math Logs When do we use twice as much, 2 times as many, or 3 times as many? When have you heard that language being used?

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