What is the circumference of the circle below in terms of pie?

1.1 (pie sign)
1.21 (pie sign)
2.2(pie sign
4.4 (pie sign)

We have to calculate the circumference of a circle and to choose the correct answer. The circumference of a circle is given by a formula: C = 2 r Pie. In this case radius of the circle is : r = 2.2. Therefore C = 2 * 2.2 Pie = 4.4 Pie. The circumference of the circle is: D ) 4.4 Pie.