2. Perimeter
- To find the perimeter of a figure: ADD ALL SIDES (that are on the outside)
1 cm
1 cm3 cm
2 cm
2 cm
1 cm
1 cm
1 cm
Perimeter:
3 cm + 2 cm + 2 cm + 1 cm + 1 cm + 1 cm = 10 cm
3. Perimeter
- Without grids to help!
13 cm
10 cm
7 cm
9 cm
Perimeter ADD ALL SIDES (that are on the outside) :
10 cm + 9 cm + 13 cm + 7 cm = 39 cm
4. Area
- Amount of space a surface occupies
1 cm
1 cm3 cm
2 cm
Area: 6 cm21 2 3
4 5 6
5. Area
- To find area of the area of a regular shape (square or rectangle), we can multiply
Length x breadth
1 cm
1 cm3 cm
2 cm
Area:
Length x breadth
3 cm x 2 cm = 6 cm2
6. Area
- To find area of the area of a regular shape (square or rectangle), we can multiply
Length x breadth
- Without grids!
Area:
Length x breadth
9 cm x 4 cm = 36 cm2
9 cm
4 cm
7. Recap (important to recall properties of squares and rectangles!)
Perimeter Area
Add all sides Find amount or space
Or
Length x breadth (squares and rectangles)
6 cm
5 cm
6 cm + 5 cm + 6 cm + 5cm = 22 cm
Rectangle
* Opposite sides are equal
6 cm
5 cm
6 cm x 5 cm = 30 cm2
Rectangle
