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The method name `calculateCircleArea` refers to a function defined within the `Shapes` class. It takes the radius of a circle as input and calculates the area of the circle using the formula `Math.PI * Math.pow(radius, 2)`.
A method is a named block of code that performs specific tasks and can be called or invoked to execute its instructions.
Radius: The radius is the distance from the center to any point on the circumference of a circle. It determines the size of a circle.
`Math.PI` is a constant in Java that represents an approximation for π (pi), which is used in mathematical calculations involving circles.