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When did they use sundials?
There is no specific date stated as to when sundials were first used.
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.
How did they use sundials?
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.
What does the x on a sundial mean?
Sundials are usually labelled using Roman numerals, so the X would represent 10 o'clock. As sundials tend to work best with sunlight, 10pm would be dark, so the X would represent 10am.
