The radius of a circle is
always half of the diameter of the circle. In this case, the diameter is

, meaning that when we halve

, we will get our radius. Therefore, the radius of the circle is

. Hope this has helped you understand and have a great day!
It is simply would be: √π
= √3.14
= 1.7728
In short, Your Answer would be: 1.7728
Hope this helps!