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How do I remember the area of a circle if it's not in the formula book?

I tend to use rhymes to remember difficult maths formulas - it makes life so much easier! For example, "I never knew how much I cared that the area of a circle is πr²".

Answered by Madeleine P. • Maths tutor

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How do I remember the area of a circle if it's not in the formula book?

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