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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

Learn the relationship between the radius, diameter, and circumference of a 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

Calculating a circle's diameter is easy if you know any of the other ... This goes back to manipulating the formula for finding the area of a circle, A = πr2, to get the  ...

formulas.tutorvista.com/math/diameter-formula.html

Diameter of a circle is a chord which passes through the center of the circle. The diameter of a circle can be measured as the length of the line that passes ...

www.ajdesigner.com/phpcircle/circle_normal_diameter_d.php

Geometry calculator solving for circle diameter given radius.

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.easycalculation.com/area/learn-circle.php

Circle Formula: Area of Circle = πr² Diameter of Circle = 2r Circumference of Circle = 2 πr = πd Area of Sector = πr² θ/360) ...

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