pattern

色と形 - Lines, Angles, and Curves

このレッスンを読んで、英語でのいくつかの線、角度、曲線の名前、例えば「光線」、「鋭角」、「弧」などを学びましょう。

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Words Related to Colors and Shapes
axis
axis
[名詞]

the central point or line around which an object turns

軸, 回転軸

軸, 回転軸

Ex: The Earth spins on its axis once every twenty-four hours. 
axis
axis
[名詞]

a straight line that defines the symmetry or structure of a figure or object

軸, 対称軸

軸, 対称軸

Ex: The artist drew an axis to guide the proportions of the face. 
cross
cross
[名詞]

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

十字, バツ印

十字, バツ印

Ex: The teacher marked the incorrect answers with a red cross. 
diagonal
diagonal
[名詞]

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

対角線, 斜め線

対角線, 斜め線

Ex: The rectangle's diagonal was longer than its sides. 
zigzag
zigzag
[名詞]

(geometry) a shape that consists of a line alternating its direction to left and right

ジグザグ, 折れ線

ジグザグ, 折れ線

balbis
balbis
[名詞]

a straight line that is terminated by a secondary line at each end, resembling the letter H

バルビス, 各端で二次的な線によって終端される直線で、文字Hに似ている

バルビス, 各端で二次的な線によって終端される直線で、文字Hに似ている

ray
ray
[名詞]

a straight line that starts at a point and extends infinitely in one direction

光線, 半直線

光線, 半直線

Ex: The geometry teacher drew a ray from point A through point B. 
line segment
line segment
[名詞]

a portion of a straight line that is defined by two distinct endpoints

線分, セグメント

線分, セグメント

parallel
parallel
[名詞]

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, 平行線

平行, 平行線

Ex: The two parallels in the diagram never intersect. 
perpendicular

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

垂直, 垂直線

垂直, 垂直線

Ex: The wall was built with a perpendicular to support the roof. 
tangent
tangent
[名詞]

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

接線, タンジェント線

接線, タンジェント線

Ex: In geometry class, we learned how to draw a tangent to a circle, ensuring it only touched the circle at a single point. 
secant
secant
[名詞]

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

割線, セカント線

割線, セカント線

Ex: By drawing a secant, the mathematician was able to study the curve’s behavior at multiple points. 
linear pair
linear pair
[名詞]

a pair of adjacent angles formed by two intersecting lines, which add up to 180 degrees

線形対, 隣接角の対

線形対, 隣接角の対

acute angle
acute angle
[名詞]

an angle that measures between 0 and 90 degrees, which is less than a right angle (90 degrees)

鋭角, 90度未満の角度

鋭角, 90度未満の角度

obtuse angle
obtuse angle
[名詞]

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

鈍角, 凹角

鈍角, 凹角

Ex: In a triangle, an obtuse angle is one that is greater than 90 degrees but less than 180 degrees. 
right angle
right angle
[名詞]

an angle measuring exactly 90 degrees

直角, 90度の角度

直角, 90度の角度

Ex: To construct a square, each corner must form a perfect right angle. 
straight angle

an angle that measures exactly 180 degrees, which is the same as a straight line

平角, 180度の角度

平角, 180度の角度

oblique angle

an angle that measures either less or more that 90 degrees

斜角, 直角でない角

斜角, 直角でない角

Ex: In a parallelogram, opposite angles are oblique angles since they are not right angles. 
reflex angle
reflex angle
[名詞]

an angle that measures greater than 180 degrees but less than 360 degrees

反射角, 優角

反射角, 優角

full rotation

a complete revolution or turn around a fixed point or axis, covering a 360-degree angle

完全な回転, 360度の回転

完全な回転, 360度の回転

positive angle

an angle measured counterclockwise from the initial side of a reference angle in standard position, usually expressed in degrees or radians

正の角度, 正の方向の角度

正の角度, 正の方向の角度

negative angle

an angle measured clockwise from the initial side of a reference angle in standard position, usually expressed in degrees or radians

負の角度, 時計回りの角度

負の角度, 時計回りの角度

adjacent angles

two angles that share a common vertex and a common side, but do not overlap, and are not in a straight line

隣接角, 接角

隣接角, 接角

plane angle
plane angle
[名詞]

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

平面角, 二面角

Ex: The clock's hands form a plane angle at noon. 
arc
arc
[名詞]

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

弧, 円の一部

弧, 円の一部

Ex: In a circle, a minor arc is shorter than a major arc. 
arc
arc
[名詞]

a curved shape

弧, 曲線

弧, 曲線

Ex: The rainbow formed a bright arc in the sky. 
concavity
concavity
[名詞]

a shape, line or surface that is hollow and is rounded inward

凹面, 凹状の曲線

凹面, 凹状の曲線

conic section

(geometry) a shape formed when a circular cone is intersected by a plane

円錐曲線, 円錐曲線

円錐曲線, 円錐曲線

crescent
crescent
[名詞]

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

三日月, 新月

三日月, 新月

Ex: The moon hung low in the sky, its slender crescent casting a gentle light. 
curl
curl
[名詞]

something that resembles a spiral or coil

カール, 螺旋

カール, 螺旋

Ex: She had a perfect curl in her hair, framing her face beautifully. 
spiral
spiral
[名詞]

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

螺旋, 渦巻き

螺旋, 渦巻き

Ex: The staircase in the old mansion featured an elegant spiral that ascended to the upper floors. 
ellipse
ellipse
[名詞]

(geometry) a closed plane curve that has two focal points

楕円, 楕円曲線

楕円, 楕円曲線

parabola
parabola
[名詞]

(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

放物線, 放物線曲線

放物線, 放物線曲線

Ex: The path of a thrown ball forms a parabola. 
hyperbola
hyperbola
[名詞]

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

双曲線, 双曲線の曲線

双曲線, 双曲線の曲線

Ex: The hyperbola is a conic section formed by intersecting a plane with two cones on opposite sides of the plane. 
simple curve
simple curve
[名詞]

a continuous curve that does not intersect itself, and can be traced without lifting the pen or pencil from the paper

単純曲線, 自己交差のない曲線

単純曲線, 自己交差のない曲線

non-simple curve

a curve that intersects itself, or has overlapping segments, requiring the pen or pencil to be lifted from the paper while tracing it

非単純曲線, 自己交差曲線

非単純曲線, 自己交差曲線

open curve
open curve
[名詞]

a curve that does not intersect itself and has distinct endpoints, meaning it does not form a closed shape or loop

開曲線, 開いた弧

開曲線, 開いた弧

closed curve
closed curve
[名詞]

a curve that begins and ends at the same point, forming a closed loop

閉曲線, 閉ループ

閉曲線, 閉ループ

色と形
Lines, Angles, and CurvesWords Related to Shapes
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