Finding Perimeter and Area Review. Perimeter The distance around the outside of an object. 10 feet 8...
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Transcript of Finding Perimeter and Area Review. Perimeter The distance around the outside of an object. 10 feet 8...
Finding Perimeter and
Area Review
PerimeterThe distance around the outside of an object.
10 feet
8 feet 8 feet
10 feet
Perimeter = 10 + 8 +10 +8 = 36 feet
Find the Perimeter
6 in
11 in
Answer: 6+6+11+11 = 34 in
13 cm
10 cm
12 cm
Answer: 10+10+13+13 = 46 cm
Find the Perimeter
13 in
5 in 5 in
4 in
8 in
Answer: 13 + 4 + 5 + 5 = 27 in
Find the Perimeter
15 cm 15 cm
12 cm
Answer: 15 + 15 +12 =42 cm
11 cm
Find the Perimeter
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
Find the Area
6 in
11 in
Answer: 6(11)= 66 in2
Find the Area
4 in
4 in
Answer: 4(4) = 16 in2
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
Find the Area
13 cmAnswer:
12 cm
27821213 cmA
Find the Area
13 cm
10 cmAnswer:
12 cm
10 x 12A = 2 = 60 cm2
Finding Area of a Parallelogram
Area of a Rectangle = L x W
= b
S
Area of Parallelogram = bh
h
L
W
Finding Area of a Rhombus
Area of a Square = S x S or S2
= b
Area of Rhombus = bh
h
S
S
Find the Area
7 cm
3 cm
5 cm
Answer: 3 (5) = 15 cm2
Find the Area
9 cm
5 cm
7 cm
Answer: 7 (5) = 35 cm2
Finding Area of a Trapezoid
Area of Trapezoid = b1 + b2 x h 2
b1
b2
h
Find the Area. 10 in
4 in 4 in
2 in
Answer:
8 in
2482
8)210( in
Finding Area of a Kite
Area of a Kite = pq 2
p
q
Find the Area
Answer = 10 x 8 = 40 cm2
2
p
10 cm
8 cm
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
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