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What's the subject formula?​

What's the subject formula?​-example-1
User HenryM
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2 Answers

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Answer:

r = √(A/4π)

Explanation:

A = 4πr^2

Divide both sides by 4π

r^2 = A/4π

Take square root of both sides.

r = √(A/4π)

We take the positive square root only as r must be positive.

User Pasquers
by
7.4k points
3 votes

Answer:

r = √A/4π

Explanation:


A=4\pi r^2\\(A)/(4\pi )=r^2\\\sqrt{(A)/(4\pi ) }=r

User Paolo Mossini
by
8.8k points

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