This math topic focuses on calculating the diameter of a circle from its given area using the value of Pi (π). It incorporates multiple-choice questions where students must apply the formula for the area of a circle \(A = \pi r^2\) to solve for the diameter, using derived expressions involving square roots and π. The problems are structured to reinforce understanding of basic circle geometry and algebraic manipulation involving π, suitable for introducing the concepts of circle area and circumference. Each question presents a different area, requiring recalculations and conversion between the radius and diameter.