Understanding Pi (π): The Mathematical Constant Explained

Discover what pi (π) is and its importance in mathematics, especially in circles.

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In math, pi (π) is a constant value that represents the ratio of a circle's circumference to its diameter. It is approximately 3.14159, but it is an irrational number, meaning it has an infinite number of non-repeating decimal places. Pi is essential for calculations involving circles, such as finding the area (A = πr²) or the circumference (C = 2πr) of a circle.

FAQs & Answers

  1. What is the exact value of pi? Pi (π) is approximately 3.14159 and is known to have an infinite number of decimal places.
  2. How do you calculate the circumference using pi? The circumference of a circle can be calculated using the formula C = 2πr, where r is the radius.
  3. Is pi a rational number? No, pi is an irrational number, which means it cannot be expressed as a simple fraction.
  4. Why is pi important in mathematics? Pi is crucial for calculations involving circles, such as determining circumference and area.

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If you are interested in learning more about mathematical constants or need help with geometry, check out our other videos explaining the Golden Ratio and the Pythagorean Theorem.

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