Perimeter And Area Worksheet
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Perimeter and Area
Now
B E F O R E
W H Y ?
You used properties of
You’ll use formulas to find
So you can find the area of a
rectangles and squares.
perimeter and area.
theater’s stage, as in Ex. 22.
3 units
The
perimeter
of a rectangle is the
sum of the lengths of the sides.
Word Watch
2 units
2 units
Perimeter is measured in linear units
perimeter, p. 32
such as inches (in.), feet (ft),
area, p. 32
3 units
centimeters (cm), and meters (m).
The
area
of a rectangle is the
Perimeter
3
3
2
2
number of square units needed to
10 units
cover the rectangle. Area is measured
(
)
2
in units such as square inches
in.
,
Area
6 square units
(
)
2
square feet
ft
, square centimeters
(
)
(
)
2
2
cm
, and square meters
m
.
You can use formulas to find perimeter and area.
Perimeter and Area
Rectangle
Square
width w
side length s
length l
P
2l
2w
P
4s
Perimeter P
2
A
lw
A
s
Area A
1
Finding Perimeter
E X A M P L E
Find the perimeter of the rectangle or square with the given
Notetaking
with
dimensions.
If you forget the formula
for the perimeter of a
a. l
5 feet, w
2 feet
b. s
3 centimeters
rectangle, you could draw
and label a diagram like
Solution
the one shown at the top
a. P
2l
2w
b. P
4s
of this page. Then just add
the lengths of the sides.
2(5)
2(2)
4(3)
10
4
14
12
The perimeter is 14 ft.
The perimeter is 12 cm.
ANSWER
ANSWER
32
Chapter 1
Number Sense, Patterns, and Algebraic Thinking
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