Year 8 Area of Circles

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What is the Radius of a circle

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measurement of the inside of a circle

the distance from one end of a circle to the other through the centre

the distance from the centre of the circle to the circumference

measurement of the outside of a circle

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What is the formula for finding the area of a circle?

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A = πd²

A = 2πr²

A = 4πa²

A = πr²

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What is the area of a circle with a radius of 5 cm

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10 cm²

15.7 cm²

31.4 cm²

78.5 cm²

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Find the area of this circle. Round your answer to two decimal places.

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380.13 m²

1520.53 m²

34.56 m²

69.12 m²

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Find the area of this circle. Give the answer to 2 decimal places.

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201.06 cm²

25.13 cm²

804.25 cm²

50.27 cm²

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The area of the circle whose diameter is 21 cm is

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346.4 cm²

37.68 cm²

18.84 cm²

19.84 cm²

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