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1.the perpendicular distance from the base of a geometric figure to opposite vertex (or side if parallel).
从几何基准面到顶端的垂直距离。收藏指正
2.The perpendicular distance from the base of a geometric figure to the opposite vertex, parallel side, or parallel surface.
顶垂线,高线从一个几何形体的底边到相对顶点、平行边或平行面的垂直距离收藏指正
3.A line that joins a vertex of a triangle to the midpoint of the opposite side.
中线从三角形顶点到对边中点的直线收藏指正
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