the central point or line around which an object turns
轴, 旋转轴
a straight line that defines the symmetry or structure of a figure or object
轴, 对称轴
a mark or an object formed by two short lines or pieces crossing each other
十字, 叉号
a straight line connecting opposite corners of a flat shape at an angle
对角线, 斜线
(geometry) a shape that consists of a line alternating its direction to left and right
之字形, 折线
a straight line that is terminated by a secondary line at each end, resembling the letter H
巴尔比斯, 两端各由一条次级线终止的直线，类似于字母H
a straight line that starts at a point and extends infinitely in one direction
射线, 半直线
a pair of geometric figures, such as lines or planes, that do not meet or intersect, no matter how far they are extended
平行线, 平行
a line or structure that meets another at a right angle, creating a 90-degree intersection
垂直, 垂直线
a straight line that touches a curve or surface at exactly one point, known as the point of tangency
切线, 切線
a line that crosses a curve at least at two distinct points
割线, 正割线
a pair of adjacent angles formed by two intersecting lines, which add up to 180 degrees
线性对, 邻补角
an angle that measures between 0 and 90 degrees, which is less than a right angle (90 degrees)
锐角, 小于90度的角
an angle that measures more than 90 degrees but less than 180 degrees
钝角, 凹角
an angle measuring exactly 90 degrees
直角, 90度角
an angle that measures exactly 180 degrees, which is the same as a straight line
平角, 180度角
an angle that measures either less or more that 90 degrees
斜角, 非直角
a complete revolution or turn around a fixed point or axis, covering a 360-degree angle
完整旋转, 360度旋转
an angle measured counterclockwise from the initial side of a reference angle in standard position, usually expressed in degrees or radians
正角, 正方向角
an angle measured clockwise from the initial side of a reference angle in standard position, usually expressed in degrees or radians
负角, 顺时针角度
two angles that share a common vertex and a common side, but do not overlap, and are not in a straight line
邻角, 相邻角
the measure of the tilt between two lines or surfaces in two-dimensional space, typically given in degrees or radians
平面角, 二面角
(geometry) a part of a circle, which is curved
弧, 圆的一部分
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
something that resembles a spiral or coil
卷曲, 螺旋
(geometry) a curved shape or design that gradually winds around a center or axis
螺旋, 螺线
(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, 抛物曲线
a geometric curve formed by the intersection of a plane with two cones, resulting in two symmetrical branches
双曲线, 双曲线曲线
a continuous curve that does not intersect itself, and can be traced without lifting the pen or pencil from the paper
简单曲线, 不自交的曲线
a curve that intersects itself, or has overlapping segments, requiring the pen or pencil to be lifted from the paper while tracing it
非简单曲线, 自交曲线
a curve that does not intersect itself and has distinct endpoints, meaning it does not form a closed shape or loop
开放曲线, 开放弧
| 颜色和形状 | |||
|---|---|---|---|
| 线条、角度和曲线 | 与形状相关的词汇 | ||
