颜色和形状 - 直线、角度和曲线

an imaginary line in the middle of an object around which the object revolves

a mark or an object formed by two short lines or pieces crossing each other

a straight line connecting opposite corners of a flat shape at an angle

a pair of geometric figures, such as lines or planes, that do not meet or intersect, no matter how far they are extended

a line or structure that meets another at a right angle, creating a 90-degree intersection

a straight line that touches a curve or surface at exactly one point, known as the point of tangency

a line that crosses a curve at least at two distinct points

an angle that measures more than 90 degrees but less than 180 degrees

an angle measuring exactly 90 degrees

an angle that measures either less or more that 90 degrees

the measure of the tilt between two lines or surfaces in two-dimensional space, typically given in degrees or radians

(geometry) a part of a circle, which is curved

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

something that resembles a spiral or coil

(geometry) a curved shape or design that gradually winds around a center or axis

(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

a geometric curve formed by the intersection of a plane with two cones, resulting in two symmetrical branches