1.a. OA, OB and OC
b. BC
2. a. 8 metres
b. 11 millimetres
3. a. 4.75 centimetres
b. 8 centimetres
4. Parts a-e all answers are 3.1
This ratio is called pi with the symbol, π
5. a. Circumference = 49.6 cm
Area = 198.4 cm2
b. Circumference = 24.8 m
Area = 49.6 m2
6. a. Diameter = 2.6 metres
b. Area = 77.5 cm2
c. Radius = 5.5 cm (to 1 decimal place.)
d. Diameter = 8 cm
7. Shaded area = 10.925 m2
8. a. Volume = 775 cm3
b. Volume = 892.8 cm3 (to 1 decimal place)
c. Volume = 258. 3cm3 (to 1 decimal place)
