What is 3π

 Here we will answer the following three questions. a) What is 3Pi? (What is 3π?), b) What is the area of a circle if the radius is 3?, and c) What is the circumference of circle if the radius is 3? 3π is another way of writing 3 times Pi (3 x 3.14). Therefore, the answer to our first question is: 3π = 9.42 Area: Next, we will calculate the area of a circle if the radius is 3. The formula for the area of a circle is πr2, which means that the area of a circle with a radius of 3 is: π32 = 28.27 Circumference: Finally, we will calculate the circumference of a circle if the radius is 3. The formula for the circumference of a circle is 2πr, which means that the circumference of a circle with a radius of 3 is: 2π3 = 18.85 Note: π or Pi has an infinite number of decimals. For our calculations on this page with a radius of 3, we used Pi with eleven decimals as 3.14159265358 and then we rounded all our answers to two decimals. Pi Calculator Go here to look up another number using our popular Pi Calculator. What is 4Pi? Go here to learn about the next number on our list.

 Helpful Definitions: Radius: The distance between the center of a circle to the edge of the circle. In our example on this page it was 3. Diameter: The distance between one side of a circle to the exact opposite side of the circle. This is the same as 2 times radius. (For example, if the radius is 3, then the diameter must be 6.) Pi: The ratio of a circle's circumference to its diameter. This is a fixed number regardless of circle size.

 Formulas used on this page: We used the following formulas on this page, where A is Area of circle, C is Circumference of circle, and r is radius: A = πr2 C = 2πr