Pi is a very illusive number that has puzzled and amazed mathematicians and scientists alike for generations. Being an irrational number we can never find out what it is exactly, so how do we use it. There are a number of ways to estimate pi by measuring the circumference of a circle and then dividi...By: 15monarchm
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from Instructables: exploring - technology - robots http://ift.tt/1zHmfZP
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