x2 + y2 = r2
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The equation is: x2+y2 = radius2
x2 + y2 = 49
Since the circle is centered at the origin, the equation of the circle is x2 + y2 = r2. So we have: x2 + y2 = (3/2)2 x2 + y2 = 9/4
x² + y² = 1.
x² + y² = 100.