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55 bytes added ,  21:41, February 11, 2012
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→‎History: brief explanation of perimeter in relation to a circle
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==History==
 
==History==
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The Greek letter π is the sixteenth letter of the [[Greek alphabet]]. It was first used with its current meaning in 1706 by a Welsh mathematician William Jones because it is the first letter of the Greek word for [[perimeter]].  
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The Greek letter '''π''' is the sixteenth letter of the [[Greek alphabet]]. It was first used with its current meaning in 1706 by a Welsh mathematician William Jones because it is the first letter of the Greek word for [[perimeter]] (the circumference of a circle is its perimeter).  
    
Mathematicians have worked for centuries to calculate <big><math>\pi</math></big> to more and more decimal places.  To some extent, the progress of mathematics&mdash;or at least of computation&mdash;can be gauged by the progress in the number of digits to which <big><math>\pi</math></big> has been calculated.  
 
Mathematicians have worked for centuries to calculate <big><math>\pi</math></big> to more and more decimal places.  To some extent, the progress of mathematics&mdash;or at least of computation&mdash;can be gauged by the progress in the number of digits to which <big><math>\pi</math></big> has been calculated.  
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