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-- Collect all the information you know about the object whose circumference
you need to find, such as its radius or diameter.
-- Substitute the information you have into a mathematical formula that relates
circumference to the information you have.
Wiki User
∙ 12y ago
Wiki User
∙ 15y agoThis all begins with a story of mathematicians who were arguing about the division of the circle. At first, one said we should split circles in percentiles, whilst another said in quartiles. These were rejected. What happened was that one decided to measure the radius of a circle, for example it was 6 units. So, he started to measure the perimeter of the circle (circumference) and marked a segment whenever the value of the radius was found. after measuring the entire circle, he noticed that there were 6 segments, and a part of a segment. So he tried again with different radii and there were always 6 segments and a bit. So, this 6 and a bit was divided by 2, to yield "3 and a bit" which is what we call pi. So, as you've noticed, the formula for circumference is: the radius multiplied by 2 times pi, which is the correct formula! An alternative way would be to find the value of the constant that the radius is multiplied by to get the circumference as they are directly proportional, so a constant must exist, which you will find to be 2 x pi.
Wiki User
∙ 7y agoTo get the CIRCUMFERENCE you multiply the diameter times pi. (Which is 3. 14)
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What is the circumference of a hula hoop that has a radius of 424 meters?
circumference equals: pi x 2 x radius So, 424 x 2= 848 848 x 3.14 (pi)= 2662.72 meters is the circumference
What is the normal range for head circumference in adults?
The average circumference of the human head in men is 55.9 cm. The average circumference of a woman's head is 54.47cm. There is rarely more than 2cm difference either way.
Why do you need circumference?
well if a builder wants to know how large a circle needs to be for a zoo or anything, he/she would use circumference. Amanda Steffey
What do you mean by girth?
The distance "around" or circumference, as in the waistline.
When a circumference is reduced by 6 why is the radius reduced by 1?
The equation relating the radius r of a circle to its circumference C is 2 * pi * r = C. If pi were equal to three, then this would simplify to C = 6r. Since pi is not exactly three, decreasing the circumference by 6 units will actually decrease the radius by a bit less than 1 unit.
How did pi come about?
It was inititially recognised as the ratio between the radius and circumference of a perfect circle. The radius times "Pi" equals the circumference of a perfect circle.
How it will come the perimeter of a quarter circle?
It is a 90 degree turn or circumference/4
What does the ratio of the value of pi come from?
Any circle's circumference divided by its diameter has a value of pi
What is the circumference of a potato?
Potatoes come in different sises and they are rarely spherical so there is no definitive answer to this question.
What is the circumference of a loonie?
A circumference is 4
Is the radius one fourth of the circumference?
No. It is circumference/(2*pi)No. It is circumference/(2*pi)No. It is circumference/(2*pi)No. It is circumference/(2*pi)
Where does the circumference of a circle come from?
pi = Cirumference C divided by diameter d. The circumference is the distance around a closed curve. Circumference is a kind of perimeter. Circumference of a circleThe circumference of a circle can be calculated from its diameter using the formula:C = pi times dOr, substituting the diameter for the radius:C = pi times 2 rwhere r is the radius and d is the diameter of the circle, and pi is defined as the ratio of the circumference of the circle to its diameter.The numerical value of pi is 3.141 592 653 589 793...
What does the word pi come from in greek?
It is the 16th letter of the Greek alphabet. In mathematics it is the ratio of the circumference of a circle to its diameter
What is the circumference of Betelgeuse?
The circumference of Betelgeuse is about 1180 times the circumference of our sun.
Why is circumference equal to 2 times Pi times r?
circumference=pi circumference=pi circumference=pi
What is the circumference of a circle with the radius of 43?
Circumference = 2pi*r Circumference = 86pi
What is the formula of a circumference?
circumference=r2pi
