18 inches
The diameter of a circle is twice the radius. A circle with a radius of 9 would have a diameter of 18. (9*2=18).
Diameter is twice the radius, so 18 feet.
Well, isn't that just a happy little question! If the diameter of the wheel is one yard, which is 36 inches, then the radius would be half of that. So, the radius of the wheel would be 18 inches. Just remember, there are no mistakes, just happy little accidents!
A circle with a radius of 18 centimeters has an area of 1,017.88 square centimeters.
If the diameter of a circle is 18 inches then its radius is 18/2 = 9 inches
18 inches
A circle with a radius of 9 inches has a circumference of 56.55 inches and a diameter of 18 inches.
Diameter = twice the radius = 2 x 18 = 36 inches.
A circle with a radius of 18 inches has a circumference of 113.097 inches.
R=D/2. If the diameter of a circle is 18 inches, the radius is 9 inches. Radius = 1/2 diameter or 9"
The radius is 9 inches because area of circle is pi*9 squared = 81pi square inches and the diameter is twice the radius which is 2*9 = 18 inches
The radius is 18 inches (r = d/2).
The diameter of a circle is twice the radius. A circle with a radius of 9 would have a diameter of 18. (9*2=18).
All depends what you mean by 18 inches, is that the circumference, the diameter or the radius
The radius of a circle is always half of the diameter. Therefore, if the diameter of a circle is 36 units, the radius would be half of 36, which is 18 units. The formula for finding the radius from the diameter is radius = diameter / 2. So, in this case, the radius would be 18 units.
A circle with a radius of 18 inches has an area of 1,017.88 square inches.