This math topic focuses on determining the radius of a circle given its area, incorporating the use of the mathematical constant π (Pi). The skill practiced is solving the formula for the area of a circle, \(A = \pi r^2\), to find the radius \(r\) when the area \(A\) is known. This involves algebraic manipulation, primarily taking the square root and dividing by Pi. Each question provides an area value and multiple choice answers for the radius, requiring the learner to perform calculations involving squaring, square roots, and Pi. This contributes to a broader understanding of geometric relationships within circles.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

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Circle - Area and Image to Radius (Pi Value)

Complete these online problems with 80% or 4 correct answers in a row. Results are immediate.


If the area of this circle is 2, what it its radius?

A = 2r=?

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