To calculate the radius is very easy, the formula is d/2 where d is diametre.
therefore according to d/2 = 9cm/2
which is equals to 4.5 cm
Result : the radius of a circle with a diameter of 9 cm is 4.5 cm.
radius = 18/2 = 9 cm
Radius is half the diameter. 18 / 2 = 9 Answer: 9.0 cm
A circle with a radius of 9 inches has a circumference of 56.55 inches and a diameter of 18 inches.
The radius is half of the diameter, so 9 divided by 2 = 4.5 So, 4 and a half yards.
Circumference of a circle = 2*pi*radius or pi*diameter
radius = 18/2 = 9 cm
r= 9 so diameter is 2x the radius =18 cm
Radius is half the diameter. 18 / 2 = 9 Answer: 9.0 cm
A circle with a radius of 9 cm has an area of 254.47 square cm
A circle with a radius of 4.5 cm has a circumference of 28.27 cm
The diameter is always double the radius so in this case, it is 18cm
18mm or 1.8 cm
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).
Doubling the radius doubles the circumference.
9 cm (r = d/2)
To find the diameter of a circle with an area of 254 cm², you first need to calculate the radius. The formula for the area of a circle is A = πr², where A is the area and r is the radius. So, 254 = πr². Solving for r gives you r ≈ √(254/π) ≈ 9 cm. The diameter of a circle is twice the radius, so the diameter of this circle is approximately 18 cm.
r= 9 so diameter is 2x the radius =18 cm