Best Answer

You measure circumference by multiplying the diameter by pi. If it gives you the radius, multiply the radius by 2 to get the diameter then multiply it by pi.

Here are some helpful formulas:

Area: A=Pi r2

Diameter (If given radius) D= r x 2

Radius (If given diameter) R=d/2

Circumference= d x pi

See the related link for a helpful website to look through if you need anything else.

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Q: How do you measure circumference?
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Related questions

What does circumference measure?

The circumference of a circle measures the distance around the circle.

What is the measure of an arc?

The measure of an arc is part of the circumference of a circle

How can you measure balloons circumference?


How many centimeter is in 37 circumference?

There is no such specific unit of measure as a circumference - a circumference is merely the distance around something.

Which measure device is used to take the circumference of the body?

A tape measure.

How do you measure the circumference of the circle?

The equation for the circumference of a circle is pi times radius squared.

What volume of circumference?

Circumference is a linear measure and has no volume - just as a straight line has no volume.

Why do we measure circumference?

The circumference is the distance around a circle and it is measured by:- Circumference of a circle = 2*pi*radius or pi*diameter

How do you find the circumference of a head?

With a tape measure.

What is the circumference of a 38c?

The answer depends on what the 38 is a measure of!

The radius of a circle measure 7 feet what is the circumference of the circle?

Circumference=πd thefore it is 44

How can you put the word circumference in a sentence?

His prime objective was to measure a degree on the equator to calculate the circumference of the earth.Studies have shown there has been a large increase in waist circumference in young people.The earth's circumference was accurately measured around 240 BCE by Eeratosthenes.It isn't easy to measure the circumference of large items.