Year 10 Area of Circles

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The distance from one side of a circle to the other is called the

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radius

diameter

circumference

area

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Formula used to measure area of circle is

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4πr²

πr²

2πr²

πr² + 2r

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The area of the circle would be found using which of the following formulas...

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Area = π(4.5)²

Area = π(9)²

Area = π(18)²

Area = π(81)²

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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 correct to 2 d.p.

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201.06 cm²

25.13 cm²

804.25 cm²

50.27 cm²

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A circular clock face has a diameter of 31 cm. What is the area of the clock face? (Give the answer to one decimal place).

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754.7 cm²

3019.1 cm²

48.7 cm²

97.4 cm²

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The area of a circle is 100π square metres.
What is the diameter of this circle?

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6 m

10 m

20 m

50 m

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