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study.com/academy/lesson/what-is-diameter-definition-formula-quiz.html

In this lesson, you can find out how important the diameter is to a circle. Also, you can learn about the formulas that were figured out by the...

www.khanacademy.org/math/basic-geo/basic-geo-area-and-perimeter/area-circumference-circle/a/radius-diameter-circumference

Does not mean anything different just the radius of the circle (formula: pi * diameter). Diameter is the line that runs through the exact middle of the circle.

www.mathopenref.com/diameter.html

Definition and properties of the diameter of a circle. ... Given the radius of a circle, the diameter can be calculated using the formula. Diameter. = 2. R. where:

www.wikihow.com/Calculate-the-Diameter-of-a-Circle

This goes back to manipulating the formula for finding the area of a circle, A = πr2 , to get the diameter. You can transform this into r = √(A/π) cm. For example, if ...

www.coolmath.com/reference/circles-geometry

Definitions and formulas for the radius of a circle, the diameter of a circle, the circumference (perimeter) of a circle, the area of a circle, the chord of a circle, arc  ...

www.math.com/tables/geometry/circles.htm

Formulas & Tables · References ... diameter: the longest distance from one end of a circle to the other. ... Circumference of Circle = PI x diameter = 2 PI x radius

www.ajdesigner.com/phpcircle/circle_normal_diameter_d.php

Geometry calculator solving for circle diameter given radius.

www.mathsisfun.com/geometry/circle.html

radius diameter circumference: circle/diameter = pi = 3.14159... The Radius is the distance from the center outwards. The Diameter goes straight across the ...

www.mathgoodies.com/lessons/vol2/circumference

Thus, for any circle, if you divide the circumference by the diameter, you get a value close to pi.gif . This relationship is expressed in the following formula:.