C. 5 / 5
ExplanationStep 1: The standard form is x² + y² = r². Step 2: r² = 25 so r = 5. Step 3: The right side is the square of the radius.
Step 1: standard form x² + y² = r² होती है। Step 2: r² = 25 इसलिए r = 5। Step 3: right side radius का square होता है।
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