Area = 2,035.8 in2
A circle with a radius of 18 inches has an area of 1,017.88 square inches.
The area is 1,020 square inches.
If the diameter of a circle is 18 inches then its radius is 18/2 = 9 inches
The radius is half of the diameter. If the diameter is 18 inches, then the radius would be 18 inches ÷ 2 = 9 inches.
The area of a circle can be calculated using the formula ( A = \pi r^2 ), where ( r ) is the radius. For a circle with a radius of 18 inches, the area would be ( A = \pi (18)^2 = \pi \times 324 ). This yields an area of approximately ( 1017.88 ) square inches when using ( \pi \approx 3.14 ).
radius = 18/(2*pi) 2.864788976 area = pi*2.8647889762 = 25.783 square inches to 3 dp
The radius is 9 inches because area of circle is pi*9 squared = 81pi square inches and the diameter is twice the radius which is 2*9 = 18 inches
First we have to find the radius: 2*pi*radius = 18*pi Divide both sides by 2*pi to find the radius: radius = 9 inches Area of a circle = pi*radius2 Area = pi*92 = 81pi or 254.4690049 square inches
Radius is 18/2pi = 2.865 inches rounded to 3 decimal places
the equation to find circumference is C=2*pi*radius so when you have a radius of 18 inches, C=113.097
Radius of circle: 18/2pi = 2.865 inches rounded to 3 decimal places
18 pi inches