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
The radius of a circle is half of its diameter. If the diameter is 18 cm, then the radius would be 18 cm divided by 2, which equals 9 cm. Thus, the radius is 9 cm.
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
Doubling the radius doubles the circumference.
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).
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.
9 cm (r = d/2)