Area
What is the formula for area?
A = length x breadth
What is the formula for perimeter?
= length + width + length + breadth
= (L + B) x 2
Tom has a poster with a length of 5 m and a width of 3 m. He wants to put a wooden frame around the poster. What length of wood will Tom need to frame his poster?
16 m
What operation(s) do we usually use for a perimeter problem?
Addition / subtraction
74 x 56 =
4144
Length: 14 m Breadth: 7 m
Area of rectangle: ?
98 square metres
Length: 7 cm
Breadth: 17 cm
Perimeter of rectangle: ?
48 cm
Sally's pool table has an area of 36 square metres. The length of the pool table is 9 m. What is the width of the pool table?
4 m
What operation(s) do we usually use for an area problem?
Multiplication / Division
What is 87 divided by 2?
43.5
Length: 41 m Breadth: 23 m
Area of rectangle: ?
943 square metres
Length: 25 cm
Breadth: 19 cm
Perimeter of rectangle: ?
88 cm
Ben is painting his room. He paints 3 walls. Each wall has dimensions of 13 x 8 m. What is the total area that Ben has to paint?
312 square metres
What is the definition of perimeter?
total length or distance around the outside/outline of a shape
(add up the outlines)
A square has a perimeter of 424 cm. What is its length?
106 cm
Area of rectangle: 84 square meters
Length: 12 meters
Breadth: ?
7 metres
Perimeter- of rectangle: 56 m
Length: 15 m
Breadth: ?
13 m
Hannah and Sally are planting gardens.
Hannah's garden is 2 x 8 m. Sally's garden is 4 x 4 m. They want to put fencing around their gardens.
Who will need more fencing?
Hannah
What is the definition of area?
the entire space inside a shape
(count the tiles or multiply the length and the breadth)
A square has an area of 121 square metres.
What is its length?
11 m
Area of rectangle: 128 square meters
Breadth: 8 meters
Length: ?
16 metres
Perimeter of rectangle: 78 cm
Breadth: 17 cm
Length: ?
22 cm
Mike is taking measurements of different rooms in his house. The bonus room has an area of 72 square metres. The length of the room is 8 m. What is the perimeter of the room?
34 m
What is different about units of area compared to units of perimeter?
Units of area are "square units"
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