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A plane figure consisting of congruent arcs of a circle arranged around a regular polygon, with the end points of each arc located at the midpoints of adjacent sides of the polygon, and the tangents to the arcs at these points perpendicular to the sides.
1800x1800px .mp4
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A plane figure consisting of congruent arcs of a circle arranged around a regular polygon, with the end points of each arc located at the midpoints of adjacent sides of the polygon, and the tangents to the arcs at these points perpendicular to the sides.
1800x1800px .mp4
keyboard_arrow_down
事件
价格
自
至
日期
