1) A circle has radius 5cm. What is the diameter in cm? a) 5 b) 10 c) 20 d) 25 2) A circle has diamter 50cm. What is the radius in cm? a) 5 b) 10 c) 20 d) 25 3) A circle has a radius of 5cm. What is it's area in terms of ℼ? a) 5ℼ b) 10ℼ c) 25ℼ d) 100ℼ 4) A circle has diameter 12cm. What is the circumference in cm? a) 144ℼ b) 12ℼ c) 6ℼ d) 36ℼ 5) A circle has a diameter of 22cm. What is the area in cm2? a) 121ℼ b) 22ℼ c) 484ℼ d) 11ℼ 6) A circle has circumference 12ℼ in cm. What is the diameter in cm? a) 6ℼ b) 6 c) 24 d) 12 7) A circle has area 144ℼcm2. What is it's radius in cm? a) 12 b) 24 c) 72 d) 144 8) A circle has circumference 20ℼ. What is it's area in cm2? a) 40ℼ b) 100ℼ c) 10ℼ d) 400ℼ 9) A semi circle has a radius of 7cm. Calculate the area in cm2. a) 3.5ℼ b) 14ℼ c) 49ℼ d) 24.5ℼ 10) A circle has area 169ℼ cm2. What is the circumference? a) 84.5ℼ b) 13ℼ c) 26ℼ d) 676ℼ 11) This semi-circle has a diameter of 8cm. Calculate the total perimeter of the shape in cm. a) 8ℼ + 8 b) 4ℼ + 4 c) 16ℼ + 8 d) 4ℼ + 8 12) Calculate the area of this shape in cm2. a) 64ℼ b) 16ℼ c) 32ℼ d) 48ℼ

Area and circumference of circles

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