平方

Chinese

Pronunciation

Noun

平方

1. (arithmetic) square (as in square foot, square mile, square root); second power

   • 用減弦外，有十六，開平方，除得四步為勾，倍之為所割直徑。 [Classical Chinese, trad.]
     用减弦外，有十六，开平方，除得四步为勾，倍之为所割直径。 [Classical Chinese, simp.]

     From: 1088 CE, Shen Kuo, Dream Pool Essays

     Yòng jiǎn xián wài, yǒu shíliù, kāi píngfāng, chú dé sì bù wèi gōu, bèi zhī wèi suǒ gē zhíjìng.

     (please add an English translation of this usage example)

Derived terms

Descendants

See also

• 立方 (lìfāng)
• 乘方 (chéngfāng)
• 開方／开方 (kāifāng)

Classifier

平方

1. (chiefly Mainland China) Short for 平方米 (píngfāngmǐ, “square metre”).

Synonyms

Japanese

Etymology

Probably from Chinese 平方 (píngfāng, literally "flat square", "flat" because it accounts for 2 dimensions only). Compare 立方 (rippō, “cube”, literally "standing square", accounting for the third dimension).

First attested in Japanese in a text from 1875.

Pronunciation

• (Tokyo) へーほー (Heiban – )
• IPA^(key):

Noun

平(へい)方(ほう) • (heihō) ^{←へいはう (feifau)?}

1. (mathematics) the second power of a number etc., square
2. a square area

   １０００(いっせん) 平方(へいほう)メートル

   issen heihō mētoru

   1,000 square meters

Coordinate terms

• (mathematics): 立方(りっぽう) (rippō): third power, cube
• (mathematics): 乗(じょう) (jō): -power, as in nth power
• (area): 平米(へいべい) (heibei): a square meter
• (volume): 立米(りゅうべい) (ryūbei): a cubic meter

Derived terms

• 平方形(へいほうけい) (heihōkei): a square, a square shape
• 平方根(へいほうこん) (heihōkon): a square root

References

Korean

Noun

平方 • (pyeongbang) (hangeul 평방)

1. Hanja form^? of 평방 (“square”).

Vietnamese

Noun

平方

1. chữ Hán form of bình phương (“square”).

Adjective

平方

1. chữ Hán form of bình phương (“squared”).