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Words Related to Colors and Shapes - Lines, Angles, and Curves
Read this lesson to learn the names of some lines, angles, and curves in English, such as "ray", "acute angle" and "arc".
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balbis
[noun]
a straight line that is terminated by a secondary line at each end, resembling the letter H
ray
[noun]
a straight line with one endpoint that extends infinitely in the other direction
line segment
[noun]
a portion of a straight line that is defined by two distinct endpoints
perpendicular
[noun]
a line, segment, or structure that meets another at a right angle, creating a 90-degree intersection
linear pair
[noun]
a pair of adjacent angles formed by two intersecting lines, which add up to 180 degrees
acute angle
[noun]
an angle that measures between 0 and 90 degrees, which is less than a right angle (90 degrees)
obtuse angle
[noun]
an angle that measures more than 90 degrees but less than 180 degrees
straight angle
[noun]
an angle that measures exactly 180 degrees, which is the same as a straight line
reflex angle
[noun]
an angle that measures greater than 180 degrees but less than 360 degrees
full rotation
[noun]
a complete revolution or turn around a fixed point or axis, covering a 360-degree angle
positive angle
[noun]
an angle measured counterclockwise from the initial side of a reference angle in standard position, usually expressed in degrees or radians
negative angle
[noun]
an angle measured clockwise from the initial side of a reference angle in standard position, usually expressed in degrees or radians
plane angle
[noun]
the measure of the tilt between two lines or surfaces in two-dimensional space, typically given in degrees or radians
hyperbola
[noun]
a geometric curve formed by the intersection of a plane with two cones, resulting in two symmetrical branches
simple curve
[noun]
a continuous curve that does not intersect itself, and can be traced without lifting the pen or pencil from the paper
non-simple curve
[noun]
a curve that intersects itself, or has overlapping segments, requiring the pen or pencil to be lifted from the paper while tracing it
open curve
[noun]
a curve that does not intersect itself and has distinct endpoints, meaning it does not form a closed shape or loop
closed curve
[noun]
a curve that begins and ends at the same point, forming a closed loop
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