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Maths 3:Perimeter, Area and Volume
By: Bill Haining

2. Perimeter

3. Perimeter 2
6.3cm 2.1cm 1.2cm 0.8cm Perimeter = = 20.8

4. AREA What is the area of a shape? How much flat space it takes up.
How do you calculate the area?
Area = length x width =
8.5 x 2.1 = m2
8.5m
2.1m

5. Area 2
6.3cm 2.1cm 1.2cm 0.8cm Area = (6.3 x ( )) + (1.2 x 0.8) =(6.3 x 2.9) + (1.2 x 0.8) = = cm2

6. Area 3 What is the area of a triangle?
A triangle is half of a rectangle so the area of a triangle is:
½ x base x height

7. Area 4
1.2 m
3.1 m
Area = ½ x 3.1 x 1.2
= 1.86 m2

8. Area 5
1.5 m
1.2 m
Area = ½ x 1.2 x 1.5
= 0.9 m2

9. Volume What is the volume of a 3-D shape?
The total amount of space it takes up.
How do we calculate the volume of a cuboid?
Length x depth x height

10. Volume 2
1.2 m 1.1 m 1.4 m Volume = 1.2 x 1.4 x 1.1 = m3

11. The End
Good Luck