A dartboard has a diameter of 10 inches. What are its radius and circumference?
To find the radius of the dartboard, you divide the diameter by 2 since the radius is half of the diameter.
Radius = Diameter / 2
Given that the diameter of the dartboard is 10 inches, we can find the radius:
Radius = 10 / 2 = 5 inches
To find the circumference of the dartboard, you can use the formula:
Circumference = 2 * π * Radius
Given that the radius is 5 inches and using the value of π as approximately 3.14, we can calculate the circumference:
Circumference = 2 * 3.14 * 5
Circumference = 31.4 inches
So, the radius of the dartboard is 5 inches and its circumference is approximately 31.4 inches.
To find the radius of the dartboard, we need to divide the diameter by 2. The diameter of the dartboard is given as 10 inches, so we divide it by 2:
Radius = Diameter / 2
= 10 inches / 2
= 5 inches
Therefore, the radius of the dartboard is 5 inches.
Next, to find the circumference of the dartboard, we use the formula:
Circumference = 2 * π * Radius
Substituting the value of the radius we found earlier:
Circumference = 2 * π * 5 inches
Now, we need to know the value of π, which is a mathematical constant representing the ratio of a circle's circumference to its diameter. The approximate value of π that we commonly use is 3.14.
Circumference = 2 * 3.14 * 5 inches
= 31.4 inches
Therefore, the circumference of the dartboard is approximately 31.4 inches.
radius = D/2
C = pi D = 3.14159 * D approximately