Post on 02-Apr-2015
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AREA & PERIMETER
Created by Miss Mott
AREA
What is area?
• Area is the amount of ____________ that an object takes up.
• Area is measured in _____________ units.
• It’s what the inside measures!
There are 2 ways to find the area of an
object.
Way #1: Count the number of squares.
Way # 1: Count the total number of squares.1. What is the area? ______________________
Way # 1: Count the total number of squares.2. What is the area? ______________________
Way # 1: Count the total number of squares.3. What is the area? ______________________
Way # 1: Count the total number of squares.4. What is the area? ______________________
Way #2: Multiply the length X width.
Way # 2: Length X Width
1. What is the area? ______________________
4 cm
4 cm
2 cm2 cm
Way # 2: Length X Width
2. What is the area? ______________________
3 cm
3 cm
3 cm3 cm
Way # 2: Length X Width
3. What is the area? ______________________
8 cm
8 cm
4 cm4 cm
Way # 2: Length X Width
4. What is the area? ______________________
6 cm
6 cm
6 cm6 cm
PERIMETER
What is perimeter?
• Perimeter is the ____________ around an object.
• It is what the outside measures!
There are 2 ways to find the perimeter.
Way #1: Count the spaces outside the
object.
Way # 1: Count the number of spaces outside the object1. What is the perimeter? __________________
Way # 1: Count the number of spaces outside the object2. What is the perimeter? __________________
Way # 1: Count the number of spaces outside the object3. What is the perimeter? __________________
Way # 1: Count the number of spaces outside the object4. What is the perimeter? __________________
Way #2: Add all of the sides together.
Way # 2: Add all of the sides
1. What is the perimeter? __________________
4 cm
4 cm
2 cm2 cm
Way # 2: Add all of the sides
2. What is the perimeter? __________________
3 cm
3 cm
3 cm3 cm
Way # 2: Add all of the sides
3. What is the perimeter? __________________
8 cm
8 cm
4 cm4 cm
Way # 2: Add all of the sides
4. What is the perimeter? __________________
6 cm
6 cm
6 cm6 cm
Way # 2: Add all of the sides
5. What is the perimeter? __________________
4 cm
4 cm4 cm
Way # 2: Add all of the sides
6. What is the perimeter? __________________
Note: Each line measure 1 cm.
AREA & PERIMETER
Practice Problem #1• What is the area? ____________________• What is the perimeter? _______________ FORMULAS:
• AREA – space inside; count the squares inside or use length x width
• PERIMETER – distance around the outside; add all sides or count spaces outside the object
Practice Problem #2• What is the area? ____________________• What is the perimeter? _______________ FORMULAS:
• AREA – space inside; count the squares inside or use length x width
• PERIMETER – distance around the outside; add all sides or count spaces outside the object
Practice Problem #3• What is the area? ____________________• What is the perimeter? _______________ FORMULAS:
• AREA – space inside; count the squares inside or use length x width
• PERIMETER – distance around the outside; add all sides or count spaces outside the object
Practice Problem #4• What is the area? ____________________• What is the perimeter? _______________ FORMULAS:
• AREA – space inside; count the squares inside or use length x width
• PERIMETER – distance around the outside; add all sides or count spaces outside the object
3 cm
1 cm
3 cm
1 cm
Practice Problem #5• What is the area? ____________________• What is the perimeter? _______________ FORMULAS:
• AREA – space inside; count the squares inside or use length x width
• PERIMETER – distance around the outside; add all sides or count spaces outside the object
2 cm
2 cm2 cm
2 cm
AREA & PERIMETER