The circumference in terms of pi is 18π cm.
Give that the diameter of the circle=19 cm. Then radius=9.5 cm.
What is the formula to find the circumference of the circle?
In geometry, the circumference is the perimeter of a circle or ellipse. That is, the circumference would be the arc length of the circle as if it were opened up and straightened out to a line segment. More generally, the perimeter is the curve length around any closed figure.
The formula to find the circumference of the circle is 2πr.
Now, circumference=2π×9.5 cm=18π cm
Therefore, the circumference of a circle is 18π cm.
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