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单词 Circle Geometry
释义

Circle Geometry

中文百科

圆 Circle

(重定向自Circle Geometry)
θ 的正割是从 0 到 Q的距离.
图2:弦、圆周角、圆心角
垂径定理示意图

英语:Circle),根据欧几里得的《几何原本》定义,是在同一平面内到定点的距离等于定长的点的集合。此外,圆的第二定义是:「平面内一动点到两定点的距离的比,等于一个常数,则此动点的轨迹是圆。」

英语百科

Circle 圆

(重定向自Circle Geometry)
Chord, secant, tangent, radius, and diameter
Arc, sector, and segment

The compass in this 13th-century manuscript is a symbol of God's act of Creation. Notice also the circular shape of the halo.

A circle is a simple closed shape in Euclidean geometry. It is the set of all points in a plane that are at a given distance from a given point, the centre; equivalently it is the curve traced out by a point that moves so that its distance from a given point is constant. The distance between any of the points and the centre is called the radius.

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更新时间:2025/6/19 3:53:58