the central point or line around which an object turns
轴, 旋转轴
风扇叶片围绕其轴平稳旋转。
a straight line that defines the symmetry or structure of a figure or object
轴, 对称轴
椭圆既有长轴也有短轴。
a mark or an object formed by two short lines or pieces crossing each other
十字, 叉号
藏宝图上有一个红色的十字标记，显示了埋藏宝藏的位置。
a straight line connecting opposite corners of a flat shape at an angle
对角线, 斜线
他画了一条对角线穿过正方形，将其分成两个三角形。
(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
在图表中，射线通常用端点和其他点来标记。
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
建筑师使用了几条平行线来设计结构。
a line or structure that meets another at a right angle, creating a 90-degree intersection
垂直, 垂直线
木匠确保架子固定在完美的垂直角度上。
a straight line that touches a curve or surface at exactly one point, known as the point of tangency
切线, 切線
在几何课上，我们学习了如何画一个圆的切线，确保它只在一点接触圆。
a line that crosses a curve at least at two distinct points
割线, 正割线
曲线的割线在两个不同的点与之相交，形成一个明显的角度。
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
时钟的指针在2:30形成了一个钝角，表示已经过了中午。
an angle measuring exactly 90 degrees
直角, 90度角
在几何课上，学生们学习根据直角的存在来识别形状。
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
直角三角形中的锐角是斜角（意思是测量小于或大于90度的角）的一个例子。
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
书的一角形成一个直角平面角。
(geometry) a part of a circle, which is curved
弧, 圆的一部分
在一个圆中，弧的小弧比大弧短。
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
这条街被命名为新月大道，因为它以完美的新月形状弯曲。
something that resembles a spiral or coil
卷曲, 螺旋
猫在窗台上伸展身体，尾巴在身体周围形成一个紧紧的卷曲。
(geometry) a curved shape or design that gradually winds around a center or axis
螺旋, 螺线
贝壳展示了一个完美的螺旋，由大自然精巧地形成。
(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
艺术家画了一条抛物线来表示飞行物体的路径。
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
双曲线的每个分支都像一个镜像曲线，形成一个对称的形状。
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
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| Lines, Angles, and Curves | Words Related to Shapes | ||
