having a bluish-purple color

バイオレットの, 紫色の
difficult to notice or detect because of its slight or delicate nature
the space between two lines or surfaces that are joined, measured in degrees or radians

角度 (かくど), エンゲージ (えんげーじ)
positioned at a right angle to the horizon or ground, typically moving up or down

垂直の (すいちょくの), 縦の (たての)
(geometry) a curved shape or design that gradually winds around a center or axis

スパイラル, 螺旋
(geometry) a shape that is not two-dimensional because it has height, width, and length

立体 (りったい), ソリッド
(geometry) a flat shape with four right angles, especially one with opposing sides that are equal and parallel to each other

長方形, 矩形
(geometry) a round object that every point on its surface has the same distance from its center

球, スフィア
(geometry) a three dimensional shape with a circular base that rises to a single point

円錐(えんすい), コーン
a solid object with a square base and four triangular sides joined to a point on the top

ピラミッド, 角錐
