These cultures used the concepts of angles and lengths as an aid to understanding the movements of the heavenly bodies in the night sky. The relationships between the lengths of the chords and other l...These cultures used the concepts of angles and lengths as an aid to understanding the movements of the heavenly bodies in the night sky. The relationships between the lengths of the chords and other lines drawn within a circle and the measure of the corresponding central angle represent the foundation of trigonometry - the relationship between angles and distances.
