登录
(geometry) any flat shape with four straight sides, the opposite sides of which are equal and parallel to each other
平行四边形
a three-dimensional figure with twelve regular pentagonal faces, thirty edges, and twenty vertices
十二面体
a three-dimensional figure with twenty equilateral triangle faces, thirty edges, and twelve vertices
20面体
the measure of how much a curve or surface deviates from being straight or flat at a specific point
曲率
(geometry) a symmetrical open curve that is similar to the path of an object thrown into the air passes till it falls back to earth
抛物线
a geometric curve formed by the intersection of a plane with two cones, resulting in two symmetrical branches
双曲线
a solid shape resembling a donut or ring, made by spinning a circle around a line that does not cut through the circle
环面, 环
the section of a solid shape that remains after a parallel cut, featuring a flat top and a bottom that is larger or smaller than the top
截头体, 台体
a curved shape with narrow points at the ends that appears wider in the middle, like the shape of the moon in its first and last quarters
新月, 月牙
a surface in three-dimensional space formed by moving a straight line along a helix
螺旋面, 螺旋曲面
a mathematical shape formed by the region between two concentric circles in a plane
环形, 环
(geometry) a flat shape with four equal sides in which opposite angles are equal
菱形, 平行四边形
a straight line that a curve approaches indefinitely but never intersects, characterizing the limiting behavior of the curve
渐近线
a structure made of strips of wood, metal, or other rigid material arranged in a criss-crossed, grid-like pattern
格子, 网格
a rectangular figure that has unequal adjacent sides with arched angles
长方形,椭圆形长方体, round-edged rectangle
(geometry) a figure with four sides and two opposite angles more than 90° and two of less than 90°
菱形, 菱角
