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Area and Perimeter

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Area and Perimeter. Area of a Rectangle. A=LW. Length times Width. Length. width = 20 cm ... Perimeter. Fencing. Border. Edging. Area. Carpet. Tiles. Painting ... – PowerPoint PPT presentation

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Title: Area and Perimeter


1
Area and Perimeter
2
Area of a Rectangle
  • ALW
  • Length times Width
  • A20 12
  • A240 cm2

Length
20 cm
width
12 cm
3
Area of a Square
  • A s2
  • A side to the second power
  • A 62
  • A 66
  • A 36 ft2

side
6 feet
4
Area of Triangle
Height
  • A ½bh
  • A ½ b h

9.5 km
  • A ½ 8 9.5
  • A 0.5 8 9.5
  • A 38 km2

Base (bottom)
8 km
5
Area of a Triangle                              
                                                  
                                 
A ½ 33 54 A 0.5 33 54 A 891 mm2
33 mm
54 mm
6
Area of Parallelograms
A bh A 5 3 A 15 m2
3 m
5 m
7
Area of Trapezoid
  • A ½ h (b1 b2)

6 m
A ½ 14 (6 8)
14 m
A ½ 14 14
A 0.5 14 14
8 m
A 98 m2
8
Perimeter of Any Shape
  • Add up all of the sides.

8 in
P 29 in
10 in
10 in
4 in
4 in
9 in
10 in
10 in
9 in
P 56 in
8 in
3 in
9
Perimeter of Rectangles and Squares
6 mm
  • Rectangle
  • P 2L 2W

16 mm
12 cm
P 2 16 2 6 P 32 12 P 44mm
12 cm
  • Square
  • P 4s

P 4 12 P 48 cm
10
Perimeter
Area
  • Fencing
  • Border
  • Edging
  • Carpet
  • Tiles
  • Painting
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