1. heng - Noun
3. Heng - Proper noun
Hung.
Source: Webster's dictionaryAlthough Zhang Heng understood that the sun, moon and planets move in circles, he lacked a model for a logically structured theory and so could not establish a corresponding astronomical theory. Source: Internet
Although rough estimates for pi ( π ) were given in the Zhou Li (compiled in the 2nd century BC), Needham, Volume 3, 99. it was Zhang Heng who was the first to make a concerted effort at creating a more accurate formula for pi. Source: Internet
Born in the town of Xi'e in Nanyang Commandery (north of the modern Nanyang City in Henan province ), Zhang Heng came from a distinguished but not very affluent family. Source: Internet
In his work around 130, Needham (1986), Volume 3, 100. Zhang Heng compared the celestial circle to the diameter of the earth, proportioning the former as 736 and the latter as 232, thus calculating pi as 3.1724. Source: Internet
Barbieri-Low (2007), 204. He writes: "Zhang Heng was an official of moderately high rank and could not be seen sweating in the foundries with the gong artisans and the government slaves. Source: Internet
Mr Heng said the “circuit breaker” period has revealed vulnerabilities in society, including seniors who find it hard to use digital tools and services, and people who have difficulty coping with new stresses. Source: Internet