(せいほうけい)

せいほうけい
noun
square
1. square (shape)
A quadrilateral with four equal sides and four right angles.
正方形(せいほうけい)面積(めんせき)一辺(いっぺん)二乗(にじょう)
The area of a square is the side length squared.
This room is close to a square shape.
()(がみ)正方形(せいほうけい)()
Cut the origami paper into a square.
正方形(せいほうけい)タイル(ゆか)(なら)べた
I laid square tiles on the floor.
The teacher drew a square on the blackboard and told us to find the length of the diagonal.

正方形(せいほうけい) is the mathematical term for a square. Composed of (せい) (correct, regular) + 方形(ほうけい) (rectangle). A special case of 長方形(ちょうほうけい) where all sides are equal.

COMMON PATTERNS:

RELATED SHAPE TERMS:

CONTRAST:
四角(しかく) is the everyday adjective for "square-shaped," while 正方形(せいほうけい) is the precise geometric term.