1) Look at the picture, what is A ? a) Chord b) Radius c) Sector d) Diameter 2) Calculate the circumference of a circle with diameter 2m. Use π=3.142 a) 6.284m b) 5.1m c) 23.1m d) 4.163m 3) Calculate the circumference of a circle with radius 12cm. Use π = 3.142 a) 34 b) 69.1 c) 75.4 d) 56.51 4) Is C a diameter of the circle ? a) YES b) NO 5) The formulae 2πr, the 'r' stands for a) RADUIS b) RADDIUS c) DIAMETER d) RADIUS 6) Find a diameter of a circle with circumference 36cm. Use π=3.142. a) 13.2cm b) 17cm c) 11.5cm d) 20.2cm 7) Find the radius of a circle with circumference 63.5mm. Use π=3.142. a) 10.11mm b) 21.5mm c) 23.5mm d) 17.5mm 8) A round-shape cake has a circumference of 54 cm. What is the radius of the cake? a) 4.66cm b) 6.78cm c) 8.59cm d) 8.00cm 9) Calculate the arc length of the sector given in the picture. Use π = 3.142 a) 3.15cm b) 5.498cm c) 6.0cm d) 2.29cm 10) A ball fits exactly into a square box as shown in the diagram. If the length of the box is 21cm, find the circumference of the circle. Use π = 3.142 a) 70 cm b) 65.98 cm c) 56.45 cm d) 86.43 cm

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