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Make $r$ the subject in this formula.
Mathematics 0580 · IGCSE · Algebraic manipulation
Algebraic manipulation — practice question
$A=4\pi r^2$.
Worked solution & mark scheme
This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “$\frac{1}{2}\sqrt{\frac{A}{\pi}}$ or $\sqrt{\frac{A}{4\pi}}$” …
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