# How to find the circumference of a circle

The circumference of a circle is the length of its boundary, it cannot be determined with the help of a scale-line. This is attributable to the fact that a circle is a curvy figure. Therefore, we calculate the circumference of the circle with the help of the circumference formula.

Circumference of a circle=π diameter

C=π×d

Example: What is the circumference of a circle whose diameter is 13 units?

Solution: Given diameter = 13 units

Let us use the circumference formula and substitute the value of diameter in it.

Circumference of circle formula=π×d

C=π×d

C=3.14×13

C=40.82 units

Hence, the circumference of a circle is 40.82 units.

Problem: Lauren is planning a trip to London and wants to ride the London Eye, the world's most famous Ferris wheel. She discovers the radius of the circle measures around 78 meters while investigating details about the enormous Ferris wheel. What is the Ferris wheel's estimated circumference? As a rough estimate of pi, use 3.14.

Solution:

The Ferris wheel has a radius = of 78 m

Ferris wheel’s circumference = ?

Using circumference formula

Circumference of ferries wheel = 2 π  r

C =3.14

C= 489 m

## What is the circumference of a circle

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## Circumference of a circle formula

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## What is the formula for the circumference of a circle

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## How to calculate the circumference of a circle

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## How to measure the circumference of a circle

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## How to find circumference of a circle with diameter

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## Circumference of a circle with diameter

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## Radius of a circle from circumference

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## How to find the area and circumference of a circle

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## Examples about circumference of a circle

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