1 (a) Area of a rectangle = l × w
= 8 × 5 = 
40 cm2

(b) Area of triangle = 0.5 × base × height
= 0.5 × 6 × 4 = 
12 cm2

(c) Area of trapezium = 0.5 × sum of parallel sides × height
= 0.5 × (7 + 13) × 6 = 
60 cm2

(d) Area of triangle = 0.5 × base × height
= 0.5 × 6 × 8 = 
24 mm2


2. (a) Area of parallelogram = base × height
= 7 × 8 = 56 cm2

(b) Area of parallelogram = base × height
= 10 × 7 = 70 cm2


3. (a) Perimeter = sum of all sides
= 4 + 3 + 4 + 3 = 14 cm

(b) Perimeter = sum of all sides
= 4 × 5 = 20 m

(c) Perimeter = sum of all sides
= 8 + 9 + 15 = 32 cm

(d) Perimeter = sum of all sides
= 8 + 5 + 3 + 7 + 5 + 12 = 40 m


4. (a) Circumference = πd
= π × 8 = 25.12 m
Area = πr
π × 16 = 50.24 m2

(b) Circumference = πd
π × 16 = 50.24 m
Area = πr
π × 64 = 200.96 m2


5. (a) Area of field = length × width
= 110 × 70 = 7700 m2

(b) 1 hectare = 10 000 m2
7700 m2 = 7700/10000 = 0.77 ha


6. (a) 1010 cm2 (b) 108 cm2 (c) 104 cm2


7. (a) Area of shape = 10 × 2 + 8 × 2
36 m2

(b) Area of shape = 12 × 10 − 6 × 4
96 cm2


8. (a) Area of shape = 12 × 6 − 4 × 5
52 cm2

(b) Area of shape = π × 62 − π × 42
= 36π − 16π
= 20π
62.8 cm2