Geometry

Question Analysis

The main focus is leveraging the property that a tangent to a circle is perpendicular to the radius at the point of tangency. Since  is tangent to  at point , . We'll use the Pythagorean theorem in right - triangle  to find the value of .

 

Key Concept Explanation

A tangent to a circle forms a right - angle with the radius at the point of contact. In right - triangle , with  (radius),  (tangent segment), and  (hypotenuse), we apply the Pythagorean theorem () to solve for

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