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1The enclosing boundary of a curved geometric figure, especially a circle.
‘In the normal geometry of flat space, the diameter of a circle is its circumference divided by pi.’
‘As a result of this activity, students may or may not discover that the diameter and the circumference of the circle stand in a linear relationship.’
‘Taking a circle of diameter 10,000,000 chang, he found the circumference of this circle to be less than 31,415,927 chang and greater than 31,415,926 chang.’
‘Spanish swordsmen attack and defend by stepping around each other along the circumference of the circle.’
‘Galileo established the circumference of the larger circle by restricting the subject matter of physics to statements about primary qualities.’
‘At its simplest, pi is the ratio of the circumference of a circle to its diameter.’
‘We should have a polygon inscribed in the circle the sides of which coincide with the circumference of the circle.’
‘The 18th-century Chinese scholar Tai Chen presented an elegant dissection for approximating the value of pi - the ratio of a circle's circumference to its diameter.’
‘We would regard the starting point as the easternmost point along the circumference of the circle.’
‘Pi, whose decimal value is 3.1415926535…, is simply the ratio of the circumference of a circle to its diameter.’
‘The letters spelling out Canadian Security Investigative Service were in big white bold letters around the circumference of the circle.’
‘In maths today they could not work out the circumference of a circle.’
‘We will locate a marker on the circumference of a circle.’
‘The perimeter of the inner polygon is shorter than the circumference of the circle.’
‘Since E lies on the circumference of both circles, it is located at one of the points of intersection.’
‘The mathematical constant pi is the number you get when you divide a circle's circumference by its diameter.’
‘His last work was on the cycloid, the curve traced by a point on the circumference of a rolling circle.’
‘He regretted that an exact measure of the circumference of a circle in terms of diameter was not available.’
‘It can be shown by geometry that the radius of a circle will inscribe six equal chords within the circumference of the circle.’
‘I've long since forgotten quadratic equations and how to calculate the circumference of a circle.’
‘The World Health Organization standards for waist and hip circumferences are based on measurements made in the standing position.’
‘The length of the collar should be approximately two inches longer than the circumference of the dog's neck.’
‘The winner of the under ten category was Scarlet, whose pumpkin had a circumference of 57 inches.’
‘The circumference of my thighs was reduced by between half and a quarter of an inch.’
‘After measuring a drum shade, add 1 inch to the circumference and 3 inches to the height.’
‘Measure the circumference of your wrist where the bracelet will be worn.’
‘He has travelled more than 774,200 miles on trips in Italy and abroad, equivalent to nearly 30 times the circumference of the earth.’
‘Each subject was placed in the supine position, and upper arm and wrist circumferences were measured to determine proper cuff size.’
‘One commonly used method for quantifying differences in body fat distribution is to measure and comopute the ratio of the waist circumference to the hip circumference.’
‘I had to measure the circumference and calculate the diameter to make sure it would fit in and out of my doorway!’
‘You would do better to cut out a large circle of wood and use a tape measure to find its circumference and diameter.’
‘A hailstone with a 7-inch diameter and a circumference of 18.75 inches was recently named the largest hailstone ever recovered in the United States.’
‘A search for a new teak wood tree of the required circumference and length began.’
‘Measure the circumference of your head in inches and see what you get!’
‘Waist circumferences of 35 inches or greater in women have been associated with increased health risks.’
‘You can walk the entire circumference, a distance of 1.3 km.’
‘Calculating your body mass index and measuring your waist circumference are two ways to help tell if you're overweight or obese.’
‘They had these peculiar heels that were of a similar circumference to a ballpoint pen, and were about six inches in depth.’
‘Men should have a waist circumference less than 40 inches.’
‘Maternal arm and calf circumferences were measured with plastic-covered fabric measuring tapes and read to the nearest millimeter.’