That depends what it is a quarter of.
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A quarter of an inch = 0.635 cm
The exact circumference of the quarter is 7.53982237 cm
The perimeter of a quarter circle is 2 radii plus a quarter of the circumference of the whole circle: → 2 × radius + ¼ × 2 × π × radius = 32.13 cm → radius × (2 + π/2) = 32.13 cm → radius = 32.13 ÷ (2 + π/2) cm ≈ 9.00 cm
188 cm.
10 cm Cutting out a quarter of the circle doesn't affect the radius, which is half of the diameter.