Meaning of Diameter
What is Diameter:
The diameter (Ø) is the line that crosses the center of a circle joining two points on its perimeter and defines the width of a circle.
The word diameter has Greek roots and is composed of the prefix day- which means through and the word metron which refers to the measure.
In geometry, the diameter of a circle is calculated using the following formula:
Ø = 2 • r
This means that the diameter of a circle is equal to twice its radius. The radius of a circle is the line that joins the center with a point on its perimeter.
The calculation of the diameter of a circle is important, since it allows us to calculate:
- The perimeter of a circle: also known as the circumference, that is, the curved line that delimits the circle. The formula to calculate the perimeter of a circle is P = Ø • π where π (pi) is equal to 3.14.
- The radius of a circle: it is half its diameter, that is, r = 2Ø.
The circle is one of the most common shapes in our Universe. The planets and the sun are circles or spheres.