Perimeter Of A Circle Circumference of a Circle Circumference means, ‘the perimeter of a circle’. The word has been derived from the Latin word circumferre means to carry around. The distance around a circular region is also known as its circumference.Note:The ratio of circumference to diameter is approximately the same around 3.142. i.e. The circumference of a … [Read more...] about How To Calculate The Perimeter Of A Circle