已知

yǐzhī

adjective

Meanings

HSK 7-9

这是目前已知最大的恐龙化石。

Zhè shì mùqián yǐzhī zuì dà de kǒnglóng huàshí.

This is the largest dinosaur fossil known so far.

HSK 7-9

已知长方形的长是五厘米，宽是三厘米，求它的面积。

Yǐzhī chángfāngxíng de cháng shì wǔ límǐ, kuān shì sān límǐ, qiú tā de miànjī.

Given that a rectangle is five centimeters long and three centimeters wide, find its area.

usage

Math problems open with 已知 "given" and end with 求 "find". The opposite of 已知 is 未知 "unknown", and an unknown in an equation is a 未知数.

已 yǐ

知 zhī