With the circle still selected add a Hair and Fur modifier (under World-Space Modifiers in the Modifiers List). Under Frizz Parameters rollout set everything to 0.
Under General Parameters rollout put these settings: Hair Count: 100; Hair Segments: 1; Rand. Scale: 0; Root Thick: 60; Tip Thick: 40.
Under Display rollout set the Percentage to 100 and tick the As Geometry box.
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