The circumference of a semicircle is 10.28 cm. What's its radius?

The circumference of a semicircle is 10.28 cm. What's its radius?

If the radius is R and the perimeter is C, then 2 π r = C. according to the title, 2R + C / 2 = 10.28, we can calculate the radius according to these two formulas
28 / (2 + π), the conclusion is 2 cm

If the circumference of a semicircle is 10.28cm, then its radius is () cm,

1/2πd+d=10.28
d=4
So r = 2
If the circumference of a semicircle is 10.28 cm, then its radius is (2) cm

The circumference of a semicircle is 10.28 meters, and the diameter of the semicircle is______ Rice

Let the diameter of the circle be d meters, π D △ 2 + D = 10.28, 1.57d + D = 10.28, & nbsp; 2.57d = 10.28, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; d = 10.28 △ 2.57, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; d = 4. A: the diameter of the semicircle is 4 meters, so the answer is: 4