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Finding Perimeter and
Area Review
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PerimeterThe distance around the outside of an object.
10 feet
8 feet 8 feet
10 feet
Perimeter = 10 + 8 +10 +8 = 36 feet
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Find the Perimeter
6 in
11 in
Answer: 6+6+11+11 = 34 in
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13 cm
10 cm
12 cm
Answer: 10+10+13+13 = 46 cm
Find the Perimeter
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13 in
5 in 5 in
4 in
8 in
Answer: 13 + 4 + 5 + 5 = 27 in
Find the Perimeter
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15 cm 15 cm
12 cm
Answer: 15 + 15 +12 =42 cm
11 cm
Find the Perimeter
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Finding Area of a Rectangle
Area of a Rectangle: L x W (length x width)
Square 4 sides all sides equal right angles
Rectangle 4 sides opposite sides equal right angles
Area of a Square: L x W (length x width)
Which is also S x S or S2
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Find the Area
6 in
11 in
Answer: 6(11)= 66 in2
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Find the Area
4 in
4 in
Answer: 4(4) = 16 in2
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Finding Area of a Triangle
Area of a Square = S2
Area of Triangle = ½ S2
S
S
L
WArea of a Rectangle = L x WArea of Triangle = ½ L x W
= b
= h
Area of Triangle = ½bh
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Find the Area
13 cmAnswer:
12 cm
27821213 cmA
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Find the Area
13 cm
10 cmAnswer:
12 cm
10 x 12A = 2 = 60 cm2
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Finding Area of a Parallelogram
Area of a Rectangle = L x W
= b
S
Area of Parallelogram = bh
h
L
W
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Finding Area of a Rhombus
Area of a Square = S x S or S2
= b
Area of Rhombus = bh
h
S
S
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Find the Area
7 cm
3 cm
5 cm
Answer: 3 (5) = 15 cm2
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Find the Area
9 cm
5 cm
7 cm
Answer: 7 (5) = 35 cm2
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Finding Area of a Trapezoid
Area of Trapezoid = b1 + b2 x h 2
b1
b2
h
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Find the Area. 10 in
4 in 4 in
2 in
Answer:
8 in
2482
8)210( in
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Finding Area of a Kite
Area of a Kite = pq 2
p
q
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Find the Area
Answer = 10 x 8 = 40 cm2
2
p
10 cm
8 cm
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Finding Area and Circumference of Circles
π = 3.14
Diameter – the distance from one side of a circle to the other through the center
Radius – the distance from the center of a circle to the side
½ of the diameter
Area of a Circle = πr2Circumference of a Circle = 2πr or πd
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Find Area and Circumference
A= πr2C= πd
d = 14 cm
C= 3.14(14) C= 43.96 cm
A= 3.14(7)2A= 153.86 cm2