en.wikipedia.org/wiki/Circumference

The **circumference** of a closed curve or circular object is the linear ... A000796).
Pi is defined as the ratio of a circle's **circumference** C to its **diameter** d: π = C d {\
displaystyle \pi ={\frac {C}{d}}} \pi ={\frac {C}{d}}.

www.emathzone.com/tutorials/geometry/relation-between-the-circumference-and-diameter.html

It we measure the **circumference** and **diameter** of various circles, we will find that
the ratio of the **circumference** and their corresponding **diameters** is always ...

www.enotes.com/homework-help/relationship-between-circumference-circle-diametre-126689

Let's start with a few definitions. The **circumference** of a circle is the measurement
of the whole circle, the outside of the circle. The **diameter** of a circle is 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.

socratic.org/questions/relationship-between-the-radius-diameter-circumference-and-area-of-a-circle

May 15, 2017 **...** radius→×2→**diameter**→×π=**circumference**. radius→squared→×π→=area. There
are formulae you should learn for the circle: 2r=D⇔D=r2.

www.pbslearningmedia.org/resource/ng09.math.geometry.pla.diameter/relationship-between-diameter-and-circumference

Using two circles nearby, they compare the **diameter** of each circle to its
**circumference**. They realize there is a special **relationship between** the
**circumference** of ...

www.math-only-math.com/relation-between-diameter-radius-and-circumference.html

**Relation between diameter** radius and **circumference** are discussed here.
**Relation between Diameter** and Radius: What is the **relation between diameter**
and ...

sciencing.com/differences-between-circumference-diameter-8493863.html

Apr 24, 2017 **...** In geometry, the terms **circumference** and **diameter** refer to the length of specific
parts of ... **Relationship Between Diameter** and **Circumference**.