sherrieb09 sherrieb09
  • 11-10-2017
  • Mathematics
contestada

Rearrange the formula A = \pi r ^ ( 2) for r

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altavistard
altavistard altavistard
  • 11-10-2017
Consider re-writing this formula as "A = pi*r^2."  The backslash symbol "\" is unnecessary.

If A = pi*r^2, and we wish to solve for r, then divide both sides by pi:

A/pi = r^2

Taking the square root of both sides,   sqrt(A/pi) = r (r must be positive in this situation).
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