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Mathematics for IGCSE & O level - Using A Calculator (Section 2 - No. 17)
What is the formula used to find area?
$$ A = 4pi r^2 $$
$$ A = r^2 $$
$$ A = 2pi r $$
None of the above
Forklaring
The formula is $$ A = 4pi r^2 $$.
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