MSN: Over 2,200 years ago, Eratosthenes calculated the circumference of Earth, and his math was almost totally accurate
Over 2,200 years ago, Eratosthenes calculated the circumference of Earth, and his math was almost totally accurate
IFLScience: How Eratosthenes Measured The Earth's Circumference With A Stick In 240 BCE, At An Astonishing 38,624 Kilometers
How Eratosthenes Measured The Earth's Circumference With A Stick In 240 BCE, At An Astonishing 38,624 Kilometers
Earth's shape is an oblate spheroid, slightly bulging at the equator due to its rotation, resulting in a significant difference in distance from the Earth's center between the equator and poles. This ...
Use this free circumference calculator to find the area, circumference and diameter of a circle.
How to calculate the circumference of a circle? The circumference of a circle is calculated using the formula: 2 x π x radius, where π is a mathematical constant, equal to about 3.14159.
The circumference of a circle is the distance around the boundary of the circle. It is the same as calculating the perimeter of any polygon such as triangle, square, and rectangle.
The circumference of a circle is the distance around it, but if, as in many elementary treatments, distance is defined in terms of straight lines, this cannot be used as a definition.
Keep reading for everything you need to know about how to figure out the circumference of a circle using either the diameter or the radius. We've even got a circumference calculator to make things easy. Use the formula C = πd to find the circumference if you know the diameter.