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Detailed explanation-1: -The value of Pi () is the ratio of the circumference of a circle to its diameter and is approximately equal to 3.14159.

Detailed explanation-2: -Experts define it as the ratio of a circle’s circumference to its diameter. The value of Pi is approximately 3.14159 and its appearance takes place in many formulas in all areas of mathematics.

Detailed explanation-3: -In some ways Pi () is a really straightforward number – calculating Pi simply involves taking any circle and dividing its circumference by its diameter.

Detailed explanation-4: -Perimeter of a circle is given by 2r, where r is the radius of the circle.