Translation guide
A plane figure is a flat, two-dimensional geometric shape. In Japanese, this concept is expressed using terms like 平面図形 (heimen zukei) for general contexts, or more specific words depending on the shape.
平面図形
plane figure (general)
The learner wants to refer to any two-dimensional geometric figure in a mathematical or general context.
Standard term for 'plane figure' in geometry. Used in educational and technical contexts.
この平面図形の面積を求めなさい。
Find the area of this plane figure.
Literally 'plane diagram', often used for a drawing or plan of a flat shape, especially in drafting or design.
設計図にはいくつかの平面図が含まれている。
The blueprint includes several plane figures.
The learner wants to name a particular flat shape, such as a triangle or circle.
Triangle. One of the most basic plane figures.
三角形の内角の和は180度です。
The sum of the interior angles of a triangle is 180 degrees.
Quadrilateral. General term for any four-sided plane figure.
Circle. Common plane figure.
円の直径は半径の2倍です。
The diameter of a circle is twice the radius.
Polygon. A plane figure with many sides.
正方形は四角形の一種です。
A square is a type of quadrilateral.
五角形や六角形は多角形です。
Pentagons and hexagons are polygons.