Q:
# Who invented the circle?

Since circular creations appear throughout nature, no man can be credited with the invention of the circle. From the cross-section of a plant stem to the moon and the sun, circles appear everywhere in nature.

Continue Reading
Credit:
fdecomite
CC-BY 2.0

Ancient mathematicians, astronomers and engineers observed, measured and were inspired by the circle. Egyptian engineers used methods to compute areas and volumes for circles. As early as 1700 B.C., the Rhind papyrus records a method to find the area of a circular field. Written in 300 B.C., “Book 3” of Euclid's “Elements” deals with the characteristics of circles. Plato's “Seventh Letter” presents a detailed definition and explanation of the circle and the author’s conclusion that no one has ever seen a perfect circle, only approximations.

Learn more about Shapes-
Q:
## Does a circle have rotational symmetry?

A: Rotational symmetry is a characteristic of any perfect circle. This means that the shape can be rotated less than 360 degrees and still appear exactly the ... Full Answer >Filed Under: -
Q:
## How many sides does a circle have?

A: Based on the geometric definition of a polygon, a circle has no sides or infinite sides. According to the definition, a circle cannot have sides because it... Full Answer >Filed Under: -
Q:
## How do you find the arc length of a circle?

A: The length of an arc of a circle is obtained by using the formula L=?r?/180, where L is the length of the minor arc of the circle, r is the radius of the c... Full Answer >Filed Under: -
Q:
## How do you calculate the circumference of a circle?

A: To calculate the circumference of a circle, multiply the diameter of the circle in question by pi. You need to know the diameter of the circle to complete ... Full Answer >Filed Under: