3.14258 D. 3.14289 Ans: A Explanation: The value of Pi is approximately 3.14159. It is mathematical constant and its symbol is π. 2. When Pi Day is celebrated around the world? Explanation ...

What would you do? William Jones, a mathematician from Anglesey, was the first to use the π symbol for the Pi number. He realized that the number went on forever, so it needed a symbol.