Answer:
r = √A/n
Step-by-step explanation:
the formular given as the area of circle
A= nr²
now inorder to express the formula in terms of r is the same as saying that we should make r the subject of the formulae.
A= nr²
divide both sides by n
we have
A/n = nr²/n
A/n = r²
Since we are aske to express the formula interms of r and not r²,
we are going to square both sides
A/n = r²
√A/n =( r²)²
√A/n = r
therefore
r = √A/n
