Math Grade 6 Measurement

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Measurement
Click here to begin
Standards 7.A.3b, 7.C.3b, 6.C.3b, 8.D.3b
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Measurement

• What does it mean to find the area of something?
• What does it mean to find the perimeter?

Here is an example of a problem using
measurement. Can you solve it?
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PERIMETER
Farmer Jones bought three horses.
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He must fence in his barnyard to keep his horses
from straying.
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PROBLEM
He has 72 feet of fencing available and wants to
get the largest corral for his horses.
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Here are the designs he came up with.
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Remember!!!
He wants the largest space for his horses to run
and has only 72 feet of fencing.
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Would this work?
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YES! 27927972 feet
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Would this work?
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YES! 1818181872 feet
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Would this work?
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NO! 2020202080 feet Not enough fencing
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Would this work?
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YES! 2412241272 feet
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Which is best?
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That's right!
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Formulas
When finding the area of a rectangle, follow
these steps
Step 1 Write the formula Al x w
Step 2 Substitute
Step 3 Multiply and label your answer
Lets try some examples!
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Examples of Area
Find the area of the following rectangles
2 ft
3 yd
6 ft
7 yd
A l x w
A l x w
A 2 x 6
A 3 x 7
A 12 ft²
A 21 yd²
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Examples of Perimeter
Find the perimeter of the following rectangles.
2 ft
3 yd
7 yd
6 ft
P 2l 2w
P l w l w
P2(3) 2(7)
P 2 6 2 6
P 6 14
P 16 ft
P 20 yd
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Your Turn!
Find the area AND perimeter of the following
rectangles.
7 cm
3 m
12 m
5 in
2 cm
Area
A l x w
A l x w OR A s²
A l x w
A 7 x 2
A 3 x 12
A 5 x 5 A 5²
A 36 m²
A 25 in² A 25 in²
A 14 cm²
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Your turn continued.
7 cm
3 m
5 in
12 m
2 cm
Perimeter
P l w l w
P l w l w
P l w l w
P 3 12 3 12
P 5 5 5 5
P 7 2 7 2
P 30 m
P 20 in
P 18 cm