The area is 254.47 in2
The answer is 254.469005cm squared
Using 3.14 as Pi the area of circle is: 254.34
area of a circle = pi r squared = pi x (9 squared) = 254.47 to 2 decimal places
It is increased nine fold. New Area = 9*old area.
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 of a circle with a radius of nine centimeters is: 254.5 cm2
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
A circle with a radius of 9 feet has an area of 254.47 square feet.
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
The area is 254.47 in2
The radius is 9 feet.
When you triple the radius of the circle . . . -- The diameter also triples. -- The circumference also triples. -- The area is multiplied by 9 .
The answer is 254.469005cm squared
9
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.