1.
rectangle
A quadrilateral with four right angles and opposite sides of equal length.
長方形の面積は縦×横で求める。
The area of a rectangle is calculated by length × width.
この紙は長方形だ。
This paper is rectangular.
長方形のテーブルを買った。
I bought a rectangular table.
長方形 is the standard mathematical term for rectangle. The kanji break down as 長 (long) + 方 (direction/side) + 形 (shape).
PROPERTIES:
- Four right angles (直角, 90°)
- Opposite sides are equal in length
- A 正方形 (square) is a special case where all sides are equal
COMMON PATTERNS:
- 長方形の面積: area of a rectangle
- 縦×横: length × width (formula for area)
RELATED SHAPE TERMS:
- 正方形: square
- 四角形: quadrilateral
- 三角形: triangle
- 円: circle
- 台形: trapezoid
NOTE:
Used both in mathematics education and everyday descriptions of rectangular objects (長方形のテーブル, 長方形の箱).