Geometry

Question Analysis

The main focus is to use the standard form of the circle equation to determine the radius from the given algebraic equation.

 

Key Concept Explanation

The standard form of a circle's equation is , where  is the center of the circle and  is the radius. The value on the right - hand side of the equation is the square of the radius.

 

Step - by - Step Solution

1. Compare with the standard form:

Given the equation , compare it with .

Since , find

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