Geometry

Question Analysis

The main focus is using the circle area formula to find the radius first, then determining the diameter based on the radius - diameter relationship. Given the area, we reverse - apply the formula .

Key Concept Explanation

The area formula for a circle is , and the diameter . To find the radius from the area, we isolate by dividing the area by and then taking the square root.

Step - by - Step Solution

1. Start with , substitute . We get

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