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to find circumference of a circle the equation to use is: 3.14 multiplied by diameter
so 3.14 * 18 =56.52
THE FORMULA FOR CIRCUM OF A CIRCLE =II(pie)r2
the diameter is=18
...THE RADIUS =18/2 =9 CM
=II 92
=81 II CM2
IN WORDINGS EIGHTY ONE PIE SQUARE CM
Another AnswerThe formula given above is for the area of a circle. The circumference of a circle whose diameter is known is obtained from the definition of pi, namely, the ratio of the circle's circumferene, C, to its diameter, D.
pi=C/D so C=(pi)D =(3.14)(18cm)=56.55cm Rounded
isn't there a more simple formula?????????????????????????????????
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If the diameter of a circle is 18 centimeters what is the circumference?
If the diameter of a circle is 18 centimeters the circumference will be about 56.55 cm (d x Pi = C)
What is the circumference of a circle with diameter 18cm?
18 pi cm
What is the diameter of a circle when the circumference is 35 cm?
The diameter of a circle when the circumference is 35 cm is: 11.14 cm (circumference divided by Pi = diameter).
What is a diameter of a circle with a circumference of 45 cm?
The diameter of a circle with a circumference of 45 cm is: about 14.32 cm
What is the circumference of a circle with a diameter of 12 cm?
The circumference of a circle with a diameter of 12 cm is: about 37.7 cm
