This is PI, pi = 3.14159265......
A circle is the round thing, like your pies! The area of a circle is measured using (Pi)(radius to the power of 2). Circumfrance of a circle is (Pi)(Diameter of circle).
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Pi is the ratio of a circle's circumference to its diameter, about 3.14159. Pi radians is equal to 180 degrees.
yes, it is correct perimeter = d * pi pi is the ratio between the perimeter and the diameter
pi is the ratio between the radius and the circumference of the circle if the radius is 1 the circumference is pi
pi is the square root of ten ---------- Incorrect. Pi is the mathematical ratio between the circumference and the diameter of a circle. Coincidentally, it is also the ratio between the area of a circle and the square of its radius. The square root to 10 is ~3.16227766, while Pi is ~3.1415926535897932
Pi is a number that occurs in many areas of mathematics. It is a number which has a value of approximately 3.1416. With respect to a circle, pi is the ratio between the circumference and the diameter of a circle.