Diameter is 7/22 cm. What is the circumference?
We are given a diameter of 7/22 centimeters.
A diameter is the length of a straight line segment which passes through the center of a circle and has its endpoints on the circle itself.
The circumference of a circle is simply the length of one complete revolution of the circle.
The circumference of a circle is equal to the diameter (D) times pi (`D*pi` ). The circumference of a circle is also often stated as `2*pi*R` where R is the radius. However, the diameter is simply twice the length of the radius, so we can see the two statements for circumference are equivalent.
So the circumference of our circle is:
`D*pi=(7/22)*pi=0.999 ` centimeters
Recall that the definition of pi is the circumference of a circle divided by its diameter.
Pi = circumference / diameter = approximately 3.14
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