Zetta- Zetta- Zetta is a decimal unit prefix in the metric system denoting a factor of 10 or . The prefix was added as an SI prefix to the International System of Units (SI) in 1991 and has the symbol Z. Zetta is evocative of the Latin numeral , meaning "seven". Therefore it was used to denote the seventh power of 1000. A prefix of the same value, "hepta", was informally introduced a few years before the promulgation of zetta. It was formed from the Greek (), also meaning "seven". "Hepta" never received official sanction and is obsolete. Zeta (), although
Angolalla Tera conducted by the Central Statistical Agency of Ethiopia (CSA), this woreda has a total population of 82,349, of whom 41,849 are men and 40,500 women; 5,644 or 6.85% are urban inhabitants. The majority of the inhabitants practiced Ethiopian Orthodox Christianity, with 99.1% reporting that as their religion. Angolalla Tera Angolalla Tera is one of the woredas in the Amhara Region of Ethiopia. It is named in part after one of the capitals of the former principality of Shewa, Angolalla. Located at the eastern edge of the Ethiopian highlands in the Semien Shewa Zone, Angolalla Tera is bordered on the south