Measurement: Shape and Space

1
Measurement Shape and Space
Math Gd. 6 Unit 3
Perimeter
Specific Outcome 2

• By
• Mr. Savoury

2
Perimeter

• The distance around an object.

s
P 4s
Square
l
P 2 (l w)
w
s2
s1
P s1 s2 s3
Rectangle
Triangle
s3
3
Perimeter of a Rectangle
P 2 (l w)
12 cm
What does it mean?
Add the length and the width. 12 cm 8 cm 20
cm Multiply the sum by 2. 20 cm x 2 40 cm. The
perimeter (distance around) of the Rectangle is
40 cm.
8 cm
P 2 (l w) 2 ( 12 cm 8 cm) 2 ( 20
cm) 40 cm
4
Perimeter of a Square
P 4s
8 m
What does it mean?
It means 4 x the length of the side. 4 x 8 m
32 m The perimeter (distance around) of the
square is 32 m.
P 4s 4 x 8 m 32 m
5
Perimeter of a Triangle
P s1 s2 s3
What does it mean?
It means add the length of each side together.
15 mm 20 mm 18 mm 53 mm The perimeter of
the triangle is 53 mm.
20 mm
15 mm
P s1 s2 s3 15 mm 20 mm 18 mm
53 mm
18 mm
6
Review
What is the formula for finding the perimeter of
each of the following
P 2 (l w)
Rectangle
What does the word perimeter mean? It means
the distance around an Object.
P 4s
Square
P s1 s2 s3
Triangle