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They used sundials to keep track of time using the sun. At "high noon", the sun was at its highest point, and in such a position that made the stick's shadow point at 12, then every "hour" after 12, they marked the dial in the other 11 places, making the first sundial. Sundials have advanced to use a triangle with a concavely curved side, and roman numerals instead of rocks and such. Also, they couldn't have minute hands due to the fact there couldn't be a second shadow for a second object in the center.
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When did they use sundials?
There is no specific date stated as to when sundials were first used.
Why were sundials used?
Sundials were used to tell time, back without watches.
How people use to calculate time in olden days?
Through sundials,water devices etc
Are sundials accurate?
no because its not like a clock in our days.
How are sundials useful?
In olden days, they allowed people to tell the time.
