C. 8 / 8
ExplanationStep 1: Standard circle form is x² + y² = r². Step 2: r² = 64 so r = 8. Step 3: Square root of the right side is the radius.
Step 1: Standard circle form x² + y² = r² है। Step 2: r² = 64 इसलिए r = 8। Step 3: Equation के right side का square root radius होता है।
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