To find area of a circle, the formula is πr2 where π is pi. Half of the diameter is the radius (r) so you divide 18 by 2 to get the radius (9). then, you square it (multiply it by itself) giving you 81. You then multiply this by pi to get the area. The exact answer is 81π, with a good approximation of: 254.46900494077325231547411404563973361997072134938357149897
The area of a 4.6 cm diameter circle is 16.619 square cm
If the area of a circle is given as 67cm squared, the diameter is 9.236 cm and the circumference is 29.02 cm
radius = 18/2 = 9 cm
The area of the circle is 490.87 cm2
If the diameter is 10.8 cm then the area is 91.608 cm2
A circle with a radius of 9 cm has an area of 254.47 square cm
Using 3.14 as Pi the area of circle is: 254.34
circumference = pi*18 cm area = pi*92 square cm
Circle area = (pi)r2 = 254r2 = 254/pir = √254/pi ≈ 92r = diameter = 2(9) = 18 cm
The area of a circle with a diameter of two cm is about 3.1416 cm.
A circle with a diameter of 8.5 cm has an area of 56.75 square cm
The diameter of a circle with an area of 86.54625 cm2 is: 10.49734 cm
The area of a circle with a diameter of 6 cm is: 28.27 cm2
The area of a circle that has diameter of 3 cm is: 7.069 cm2
The area of circle that has a diameter of 6.5 cm is: 33.18 cm2
For a circle with a diameter of 100 cm, the area is ≈ 9,503.32 cm2
It's 18 cm. The radius is half the diameter of a circle. Half 36 cm is 18 cm.