If you know the radius of a circle, you can calculate the diameter based on the following formula. The diameter of a circle is the distance across a. Any straight line drawn from the boundary or edge of a circle to the opposite edge and which also passes through the center of the circle is a diameter of. If you know the circumference of a circle, you can calculate the diameter based on the following formula:Ĭalculating the Diameter of a Circle Using Radius The chord of a circle which passes through the centre of the circle is called the diameter of the circle. The diameter of a circle is the length of a straight line drawn between two points on a circle where the line also passes through the centre of a circle, or any two points on the circle as long as they are exactly 180 degrees apart. The formula for working out the circumference of a circle is: Circumference of circle x Diameter of circle. "Radius" - The distance of a straight line that extends from the center of the circle to the edge of the circle.Ĭalculating the Diameter of a Circle Using Circumference To begin with, remember that pi is an irrational number written with the symbol.This is the radius of a circle that corresponds to the specified diameter. "Diameter" - The distance of a straight line that extends from edge to edge of the circle while passing through the center of the circle. The diameter of a circle is the length of a straight line drawn between two points on a circle where the line also passes through the centre of a circle, or any two points on the circle, as long as they are exactly 180 degrees apart."Circumference" - The total distance around the outside edge of a circle.In the figure above, drag the orange dots around. It is expressed in square units of measurement, for example square feet, square meters, square inches, square yards, etc. The diameter of a circle is the length of the line through the center and touching two points on its edge. Radius, Diameter, Circumference, and Geometry: Introduction to Circles Circumference of a Circle MathHelp Circles Grade 7, Unit 3 - Practice Problems. "Area" - The amount of surface covered by a two dimensional shape.
The diameter is twice the radius, the radius is half. This diameter of a circle calculator will figure out the diameter of any circle given the circumference, the radius, or the area of the circle. The diameter is the distance from one side of the circle to the other, through the centre of the circle.
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