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幾何学

17 件の記事

Pentagram

ペンタグラムの歴史と幾何学五芒星に秘められた象徴性と数学的意味

ペンタグラム五芒星ペンタクル黄金比
The assignment of semi-axes on a spheroid. It is oblate if c < a (left) and prolate if c > a (right).

回転楕円体(スフェロイド)の基礎知識扁平楕円体と長球の正体

回転楕円体扁平楕円体長球地球の形状
Illustration of a Cartesian coordinate plane. Four points are marked and labeled with their coordinates: (2, 3) in green, (−3, 1) in red, (−1.5, −2.5) in blue, and the origin (0, 0) in purple.

直交座標系(デカルト座標系)の基礎から応用まで

直交座標系デカルト座標解析幾何学x軸
The segment AB is perpendicular to the segment CD because the two angles it creates (indicated in orange and blue) are each 90 degrees. The segment AB can be called the perpendicular from A to the segment CD, using "perpendicular" as a noun. The point B is called the foot of the perpendicular from A to segment CD, or simply, the foot of A on CD.[1]

幾何学における垂直の概念と性質基礎から応用まで

幾何学垂直直交直角
A square made of PVC pipe on grass

面積の定義と計算基本公式から高度な数学的アプローチまで

面積計算公式平方メートル幾何学