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Understanding Rectangles: Perimeter and Area Review

In this lesson, we explore the concepts of perimeter and area as they apply to rectangles. We will calculate the perimeter of a room as well as determine the area needed to cover the floor with tiles. A specific example involves an 8-foot by 12-foot room, while we also consider square dimensions where the area is 100 square inches. We will find the side length of the square and its perimeter, reinforcing understanding of these fundamental geometric concepts.

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Understanding Rectangles: Perimeter and Area Review

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  1. Lesson 31 Areas of the Rectangles

  2. Review • Perimeter – the distance around the polygon. 20 ft 40 ft

  3. Area – the number of square units needed to cover a surface.

  4. How many floor tiles, 1 foot on each side, are needed to cover the floor of a room that is 8 feet wide and 12 feet long?

  5. What is the area of this rectangle? 4 cm 8 cm

  6. The area of a square is 100 square inches.A. How long is each side of the square?B. What is the perimeter of the square?

  7. Turn to page 166.

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