If pi is taken as 3.14 then:-
Circumference of the circle = pi*18 units
Area of the circle = pi*92 square units
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(pie)(diameter)=(circumference) (pie)(9)(2)=18(pie)=56.549
The circumference of a circle with a diameter of 18 inches is 56.5 inches.
18 inches
The area of a circle whose diameter is 18 inches is: 254.5 square inches.
It's 18 cm. The radius is half the diameter of a circle. Half 36 cm is 18 cm.