just in case 1/2 of the diameter
30 centimeters is.
The radius of the circle is half the diameter of the circle. 30mm radius would mean 60mm diameter or 6cm.
A circle with a radius of 2.8 centimeters has a circumference of 17.59 centimeters.
A circle that has a radius of 4.6 centimeters has an area of 66.5 square centimeters.
A circle with a radius of 18 centimeters has an area of 1,017.88 square centimeters.
The area of a circle with a radius of nine centimeters is: 254.5 cm2
A circle with a radius of 15.5 centimeters has a circumference of 97.39 centimeters.
Eighty square centimeters
Well, isn't that just a happy little question! To find the diameter of the circle, we simply need to double the radius. Since the radius is 30 mm, the diameter would be 60 mm. To convert that to centimeters, we just need to divide by 10, so the diameter of the circle is 6 cm.
50 centimeters
The area of a circle whose radius is 19 centimeters is: 1,134 cm2
The radius are 7 centimeters and the area are 153.93804002589985 square centimeters.