平方|へいほうheihou[0]heiban (flat)
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- nounsquare (e.g. metre)
- Synonym二乗にじょうNeutralNoun for the square or second power of a number, as in 「三の二乗」; it focuses on the operation, while 「平方」 also appears in area units like 「平方メートル」.
- Synonym2乗NeutralA numeric way of writing 「二乗」 with the same meaning, common in horizontal text.
Use 「平方」 for both the second power of a number or expression and area units, as in 「平方メートル」 and 「平方根」. For the operation of squaring, 「二乗」 and 「2乗」 are also common; 「2乗」 is the numeric spelling, typical of horizontal text.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


