2.
Menu
• Objectives
• Instructions
• Theme: “Perimeter and Area”
• Activities
• Glossary
3.
Objective
• Finding the perimeter and area of a
rectangle and square using formulas.
4.
Instructions
• Find the perimeter of rectangles and squares with
the given dimensions.
• Find the area of rectangles and squares with the
given dimensions.
5.
• Perimeter is the distance around a figure.
For a figure with straight sides, the
perimeter is the sum of the lengths of the
sides. Perimeter is measured in linear
units such as ft., cm, m, Km, in.
• Area is the number of square units needed
to cover a figure. Area is measured in
square units such as square centimeters
(cm2) or square inches (in2).
6.
Perimeter Formulas
• The perimeter of some polygons can be given
as a formula.
• The sides of a square are the same lengths.
The perimeter equals 4 time the lengths of a
side(s).
• Perimeter of a square: s + s + s + s = 4 x s =
P= 4s s
s s
s
7.
• The opposite sides of a rectangle are the same
length. The perimeter equals 2 times the length (l)
plus 2 times the width (w).
• Perimeter of a rectangle:
P = 2(l + w)
l
w = w
width
I = length
8.
Perimeter Activity
• The Parks Committee wants to choose the land
with the largest perimeter. Find the one they
should choose.
w = 110 ft.
l = 240 ft. s = 165 ft.
Park A Park B
9.
• The area of a shape is the amount of space
it covers.
• One way to measure the area of a shape is
to count the number of squares units it
covers.
Area Formulas
10.
• To find the area of a square or rectangle using
formulas is to multiply the length by the width.
• Area of a square = side x side = s x s = s2
• Area of a rectangle = length x width = l x w = lw
11.
Area Activity
• Find the area of the shapes:
10 cm
3 cm
A. 13 cm2 10 ft.
B. 26 cm 2
C. 30 cm2
A. 10 ft2
B. 100 ft2
C. 20 ft2
12.
• Polygon – A geometric figure made up of three or
more line segments that intersect only at their
endpoints.
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