Area
What is the formula for area?
A = length x width
What is the formula for perimeter?
= length + width + length + width
Tom has a poster with a length of 15 feet and a width of 3 feet. He wants to put a wooden frame around the poster. What length of wood will Tom need to frame his poster?
45 feet
What operation do you use for a perimeter problem?
Addition
What is the perimeter of a rectangle that is 12 inches wide and 11 inches long?
46 inches.
Length: 14 meters Width: 7 meters Area: ?
98 square meters
Length: 7 feet Width: 17 feet Perimeter: ?
48 feet
Sally's pool table has an area of 36 square feet. The length of the pool table is 9 feet. What is the width of the pool table?
4 feet
What operation do you use for an area problem?
Multiplication
74 x 56 =
4,144
Length: 41 meters Width: 23 meters Area: ?
943 square meters
Length: 25 feet Width: 19 feet Perimeter: ?
88 feet
Ben is painting his room. He paints 3 walls. Each wall has dimensions of 13 x 8 feet. What is the total area that Ben has to paint?
312 square feet
What is the definition of perimeter?
Perimeter is the space along the outside of a figure.
9,327 divided by 4
2,331 R 3
Length: 12 meters Width: ? Area: 84 square meters
7 meters
Length: 15 feet Width: ? Perimeter: 56 feet
13 feet
Mike is taking measurements of different rooms in his house. The bonus room has an area of 72 square feet. The length of the room is 8 feet. What is the perimeter of the room?
34 feet
What is the definition of area?
Area is the space inside a figure.
What are all the possible dimensions for a rectangle or square with an area of 36 square centimeters?
1 x 36 2 x 18 3 x 12 4 x 9 6 x 6
Length: ? Width: 8 meters Area: 128 square meters
16 meters
Length: ? Width: 17 feet Perimeter: 78 feet
22 feet
Hannah and Sally are planting gardens. Hannah's garden is 2 x 8 feet long. Sally's garden is 4 x 4 feet long. They want to put fencing around their gardens. Who will need more fencing?
Hannah
What is different about units of area compared to units of perimeter?
Units of area are "square units"
Why is it important to know area and perimeter?
It can help with real world math such as building a fence in your own backyard, painting a wall, putting down flooring...