PIThe number π is a mathematical constant that is the ratio of a circle's circumference to its diameter approximately equal to 3.14159. The number π appears in many formulas across mathematics and physics. It is an irrational number meaning that it cannot be expressed exactly as a ratio of two integers although fractions such as 22/7 are commonly used to approximate it. Consequently its decimal representation never ends nor enters a permanently repeating pattern. It is a transcendental number me
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