Measuring angles is one of the important concepts in Mathematics. The slokha ( from Suryasiddhantaha) given below gives some of the ancient units of measurement which is identical to the present system.
60 Vikala = 1 kala
60 kala = 1 bhaga
30 bhaga = 1 rasi
12 rasi = 1 bhagana (celestial sphere)
In the modern notation Vikala is a second, Kala is a minute, and Bhaga is a degree.
It is indeed remarkable that ancient system of measurement of angles is identical to the present system.
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