17 Area, Perimeter, Circumference

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1-7 Area, Perimeter, Circumference
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Interactive Math

• http//www.shodor.org/interactivate/activities/Per
  imeterExplorer/

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Perimeter

• Perimeter is
• distance around a shape or sum of the lengths of
  its sides
• Obj. 1 Finding Perimeter
• Your pool is 15ft wide and 20 ft long with a 3ft
  wide deck surrounding it. You want to build a
  fence around the deck. How much fencing will you
  need?

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Your pool is 15ft wide and 20 ft long with a 3ft
wide deck surrounding it. You want to build a
fence around the deck. How much fencing will you
need?
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Area

• Area is
• the number of units it encloses.
• Square/Rectangle Ab x h
• Triangle A ½ (b x h)
• Circle A
• b base hheight rradius

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Obj. 1 Finding Area

• You are designing a rectangular banner for the
  front of the museum. The banner will be 4ft wide
  and 7ft high. How much material will you need?

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Finding perimeter in coordinate plane.
(hintneed distance formula and ruler postulate)
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Find area of circle
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Circumference

• Circumference is
• the distance around a circle.
• C

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Obj. 3 Finding Circumference

• Find the circumference of a circle with radius
  18m in terms of
• Find the circumference of a circle with radius
  18m to the nearest tenth.

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Assignment

• Pg. 55 s 1, 4, 7, 8, 12, 16, 20, 21, 27, 30
• Ten problems total!