(パラレログラム)
平行四辺形
(geometry) any flat shape with four straight sides, the opposite sides of which are equal and parallel to each other
(三角錐)
テトラヘドロン
(geometry) a polyhedron with four flat sides, a triangular pyramid
(オクタヘドロン)
八面体（はちめんたい）
a geometric figure with eight triangular faces, twelve edges, and six vertices
(ドデカヘドロン)
十二面体
a three-dimensional figure with twelve regular pentagonal faces, thirty edges, and twenty vertices
(アイコサヘドロン)
二十面体
a three-dimensional figure with twenty equilateral triangle faces, thirty edges, and twelve vertices
(湾曲度)
曲率
the measure of how much a curve or surface deviates from being straight or flat at a specific point
(パラボラ)
放物線
(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
(ハイパーボラ)
双曲線 (そうきょくせん)
a geometric curve formed by the intersection of a plane with two cones, resulting in two symmetrical branches
(ドーナツ状)
トーラス
a solid shape resembling a donut or ring, made by spinning a circle around a line that does not cut through the circle
(フラスタム)
断面
the section of a solid shape that remains after a parallel cut, featuring a flat top and a bottom that is larger or smaller than the top
(弦月)
三日月
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
(ねじ面)
ヘリコイド
a surface in three-dimensional space formed by moving a straight line along a helix
(アニュラス)
環状
a mathematical shape formed by the region between two concentric circles in a plane
(菱形)
ひし形
(geometry) a flat shape with four equal sides in which opposite angles are equal
(アシンペト)
漸近線（ぜんきんせん）
a straight line that a curve approaches indefinitely but never intersects, characterizing the limiting behavior of the curve
(トラペゾイド)
台形（だいけい）
(geometry) a flat shape with four flat sides, two of which are parallel
( lattice structure)
格子
a structure made of strips of wood, metal, or other rigid material arranged in a criss-crossed, grid-like pattern
(round-edged rectangle)
長方形 (ちょうほうけい),ふくらみ (ふくらみ)
a rectangular figure that has unequal adjacent sides with arched angles
(菱形 (りょうけい))
ひし形 (ひしがた)
(geometry) a figure with four sides and two opposite angles more than 90° and two of less than 90°
文法情報:
(20辺形)
20角形
a polygon with twenty sides and twenty angles
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20 から Talking about Geometry 語を学びました。学習と語彙の復習を改善するために、練習を始めましょう！
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