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.
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.
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.
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.
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.
Polygon. A plane figure with many sides.
A square is a type of quadrilateral.
The diameter of a circle is twice the radius.
五角形や六角形は多角形です。
Pentagons and hexagons are polygons.