Area and Perimeter Review

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• Area and Perimeter Review
• 1-4-05

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Area When do we need to use area and how do we
find it?
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So, can you figure it out?

• The man on the beach want to figure out how many
  tiles to cover the beach. He said that he needed
  25 tiles to cover a square meter. If the beach
  was 1,000 meters long and 100 meters wide, what
  would the area of the beach be? How many tiles
  would you need to cover the entire beach?

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Find the area of the beach

• Length is 1,000 meters, and the width is 100.
• What is the formula for area of a rectangle?

A lw
l 1000 w 100 A lw A 1000 X 100
A 100,000 m2
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On your own

• Jonathon wants to put new carpet in his bedroom,
  so he needs to find the area of his floor. When
  he measured, his room was 9.5 feet by 10 feet.
  How much carpet will he need to buy to cover the
  entire floor?

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Solution

• A lw

A 9.5 X 10
A 95 ft2
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Perimeter When do we need to use area and how do
we find it?
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So, can you figure out this perimeter problem?

• Ms. LeClaire wants to put tape around her
  classroom for an activity on geometry. Using the
  sketch of her room, find the perimeter.

10 yd
9 yd
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• Find the perimeter of her room What is the
  formula for perimeter of a rectangle?

P 2l 2w
l 10 w 9 P 210 29 P 20 18 P 38
yd
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On your own

• Samantha wants to put purple string around her
  dresser at home. Her dresser is 2.5 ft wide and
  4 ft long. What is the perimeter of her dresser?