立 方 根(りっぽうこん)

りっぽうこん

noun

cube root

academicnumber

1. cube root

The number which, multiplied by itself three times, gives the number in question. A standard term in Japanese school mathematics.

八(はち)の立方根(りっぽうこん)は二(に)だ。

The cube root of 8 is 2.

電卓(でんたく)で立方根(りっぽうこん)を計算(けいさん)した。

I calculated the cube root on a calculator.

体積(たいせき)が分(わ)かっていれば、立方根(りっぽうこん)を取(と)ることで一辺(いっぺん)の長(なが)さが求(もと)められる。

If you know the volume, you can find the length of one side by taking the cube root.

立方(りっぽう) means cube (as in 立方(りっぽう)メートル, cubic metre) and 根(こん) here means root in the mathematical sense.

Common collocations

立方根(りっぽうこん)を求(もと)める: to find the cube root
立方根(りっぽうこん)を取(と)る: to take the cube root
立方根(りっぽうこん)を計算(けいさん)する: to calculate the cube root

Similar words

平方根(へいほうこん): square root — the same idea with two factors instead of three
立方体(りっぽうたい): cube (the solid shape) — the geometric figure, not a number

Related Words

Compare: 平方根(へいほうこん) (square root)

Compare: 立方体(りっぽうたい) (cube)

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Added 2026.7.26 3:20 · Revised 2026.9.2 13:02

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