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# What does Pi equal?

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The number Pi, symbolized by a Greek letter, has a constant value that approximately equals 3.14159. Pi is an irrational number, which means it cannot be expressed as a common fraction, and it has an infinite decimal representation without any repeating pattern.

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Pi, by definition, is the ratio of a circle’s circumference to its diameter (Pi = C/d). This constant is used to solve the area of a circle, with the formula “Pi r squared” or “the product of Pi and the square of the length of the radius.” The rounded-off version of Pi is accepted for general computations. Here’s Pi up to 20 decimal digits: 3.14159265358979323846.

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## Related Questions

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Euclid was a Greek mathematician who is famous for writing a series of 13 books called Elements about geometry and other mathematical concepts. His concepts and explanations of plane geometry, which take up approximately the first half of the Elements books, have been used as a means of teaching geometric concepts to beginning students for centuries. Some of his contributions also deal with number theory, solid geometry and mathematical deduction.

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The vertex form of a quadratic equation is written like f (x) = a(x - h)2 + k, with the letter h and the letter k being the vertex point of the parabola. It can be used to create an equation when the vertex of the parabola is known, but other points are not.

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Line symmetry of the alphabet occurs when a portion of a letter mirrors another portion. When the image is folded, the portions line up exactly. The line of the fold is considered the line of symmetry and can be horizontal or vertical.