circumference
word
Definition
The circumference is the distance all the way around a circle or a curved shape. It tells you how long the outer edge is.
Usage & Nuances
Mostly used in math and science; refers specifically to the outer boundary of circles or curved objects. Not used for straight-edged shapes (use 'perimeter' instead). Common with phrases like 'find the circumference' or 'the circumference of the circle'.
Example Sentences
The circumference of the circle is 10 centimeters.
basic
We measured the circumference with a tape measure.
basic
To find the circumference, multiply the diameter by pi.
basic
The tree was huge—the circumference of its trunk was almost three meters!
natural
Did you know the formula for circumference by heart?
natural
For the science fair, we compared the circumference of different wheels.
natural