The circumference of a semicircle is 15.42 meters, and its radius is______ Rice

The circumference of a semicircle is 15.42 meters, and its radius is______ Rice

If the radius of the circle is r m, then 2 × 3.14r-14r r \r \14r-2 + 2 + 2R = 15.42-15.42 & amp & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & 3

It is known that the circumference of a semicircle is 15.42 decimeters. What is the radius of the semicircle?

2R+pai*R=(2+pai)R=5.14R=15.42
R=3