It is 255 square "nines" whatever unit nine represents in your question.
A circle with a radius of 9 feet has an area of 254.47 square feet.
If you triple the radius of a circle, the area will increase by 9. Area is proportional to the square of the radius.
The area increases as the square of the radius (or diameter). So if you double the radius you * 4 (quadruple) the area. Treble the radius, you *9 the area.
The area increases as the square of the radius (or diameter). So if you double the radius you * 4 (quadruple) the area. Treble the radius, you *9 the area.
i believe that it is 18 if the radius is 9 edit: wrong, area = pi*radius^2 so it's 3.1415926535*81=254.469
Because the area of a circle is pi*radius2. So, if you triple the radius to 3*radius, the area becomes pi*(3*radius)2 = pi*(32*radius2) = pi*9*radius2 that is, 9 times the original area.
The area of a circle with a radius of nine centimeters is: 254.5 cm2
Radius 10, area = 100 pi; radius 9, area = 81 pi
Area= pi x radius squared. So radius (9) squared = 81, 81 x 3.14. See related link for more info.
The area is 254.47 in2
The radius is 9 feet.
Area of a circle of radius r = πr2Area of circle of radius 9 In = π(9)2 = π x 81 , putting value of pi we get= 3.14159625 x 81 = 254.46 sq. In