Mathematics is an intellectual instrument created at the beginning to help in resolving situations presented in everyday life. The idea of Ethno mathematics came as a view on how mathematics relates to the real world, taking into consideration cultural and societal differences. How measure is develop in the human species? In tropical forests people have develop different ways of measuring land than those leaving in a prairie, thus they have different geo[land]-metrics[measurement]. Those leaving near the Equator perceive days and nights elapsing in the same pace all year round, while those leaving above the tropics recognize how the seasons affect the duration of days and nights. Thus, calculating systems and consequently means of production, labor organizations etc have been developed in relation to the natural environment in different ways. Prologue by Ubiratan d’Ambrosio (Brasil) and Fr. Kallavassis.