1. Yes you do need to write this.
Area and Perimeter
Yes you do need to write this.

2. AREA The amount of space inside a 2-dimensional object.
Measured in square units cm2, m2, mm2
Not to be confused with……

3. Perimeter The distance around a two dimensional object.
Measured in ‘normal’ units eg. cm, m, mm

4. Some shapes have there own formulas for area
Yes, you do need to draw these as well.

5. Rectangle b a Area of a rectangle = ab (length x width)
Perimeter = 2a + 2b
= 2(a + b)

6. No, you don’t have to try one.

7. Parallelogram a b
‘a’ is the vertical height
Parallelogram – quadrilateral with two pairs of parallel sides.
Area = ab
Can not work out the perimeter with the information given.

8. One to try
6cm
7cm
Area = 6 x 7 =42 cm2

9. Triangle Area = ½ bh ( ‘h’ is the vertical height)
b b

10. Trapezium (a quadrilateral with one pair of parallel sides)b
Add together the parallel sides, divide by 2 and then multiply by the distance between them.
Area = (a + b) x h 2

11. Example
2cm
10cm
5cm
Area = (2 + 5) x 10 2
= 3.5 x 10
= 35 cm2

12. Compound Shapes
These are shapes made by joining two or more shapes together.
To find the area, find the area of the smaller shapes and add together.

13. Example.
7cm
10cm
8cm
3cm
7cm
2cm
8cm
3cm X Y

14. Example. Area of X = 7 x 2 = 14 cm2 Area of Y = 3 x 8 = 24 cm2
Total area =
= 38 cm2
7cm
2cm
8cm
3cm X Y

15. Last one. Find the shaded area
10cm
Area of square = 10 x 10
= 100 cm2
A. of triangle = ½ x 3 x 4
= 6 cm2
Shaded area = 100 – 6
= 94 cm2
3cm
3cm
4cm

16. The only part left is circles (always a circle question)
And then it’s volume.