The circumference of a circle is 12.56 centimeters. What is the approx. measure of the circle's radius?
A. 2
B. 2.5
C. 4
D. 8
I think that the Diameter would be 4.18 so the radius would be 2.04 or rounded to 2.
You are correct that the answer is 2 but you didn't work it properly. You divided 12.56/3 = 4.18, took 1/2 of that to obtain 2.09 and rounded to 2.00. BUT, pi is 3.14 which gives 12.56/3.14 = 4.00 and that divided by 2 = 2.00. Your teacher may have told you to use 3 for pi but I'm just pointing out that there are more significant figures in 12.56 than one.
well the answer i got was 8 because mulitilple the it
To calculate the approximate measure of the circle's radius, you can use the formula for circumference of a circle:
Circumference = 2 * π * radius
Given that the circumference is 12.56 centimeters:
12.56 = 2 * π * radius
To solve for the radius, divide both sides of the equation by 2π:
12.56 / (2π) = radius
Using a calculator to evaluate 12.56 / (2π), we get approximately:
radius ≈ 2 (rounded to the nearest whole number)
So, the approximate measure of the circle's radius is 2.
Therefore, the correct answer is A. 2.