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 = πr^{2}, 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