Bartholomew Manfredi was an Italian clock maker and in 1462 he is thought to have made reference to the pocket watch. He did not invent it however.
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the number zero is first used by Indians only not by any one else<br /><br /><br /><br /> The number zero was actually invented by the <i><b>Ancient Egyptians
you mean c? haha pythagoras
Heron, or sometimes called as Hero, invented the formula. The formula was used to find the area of a scalene triangle or an SSS triangle. The formula states for a triangle with sides a, b and c, the area can be calculated like this,K=sqrt(s(s-a)(s-b)(s-c)), where K is the area and s is the semiperimeter of a triangle i.e. s=(a+b+c)/2.
A) No known calendar goes back that far. B) No one had invented writing by then, so there is no record.
Samuel F. B. Morse got tired of being killed by bears so he invented Morse code to kill them