The formula for a circle's area is pi*radius*radius.
The diameter is equal to two times the radius.
D = 2*radius
So, the radius is 4.5 cm
Area = pi*radius*radius = 3.14159 * 4.5cm * 4.5cm = 63.617 cm2
To find the area of the shaded region, you first need to calculate the area of the entire circle. The radius of the circle is half the diameter, so it is 9 centimeters. The area of the circle can be calculated using the formula ( A = \pi r^2 ), which gives approximately ( 254.47 ) square centimeters. Since the shaded area is given as 270 square centimeters, this indicates that the shaded region exceeds the area of the circle, suggesting a possible error in the given dimensions or a misunderstanding of the problem.
The area of a circle with a radius of nine centimeters is: 254.5 cm2
3.14
Exact area of the circle: 9*pi inches
The area is 63.617 dm2
The area of a circle with a diameter of 9 inches is: 63.62 square inches.
A circle with a diameter of 9 yards has an area of 63.62 square yards.
28.27 cm
The area of a circle with a diameter of 9 feet is 63.6 sq ft (approx).The area of a circle with a diameter of 9 feet is 63.6 sq ft (approx).The area of a circle with a diameter of 9 feet is 63.6 sq ft (approx).The area of a circle with a diameter of 9 feet is 63.6 sq ft (approx).
The area of a circle with a radius of nine centimeters is: 254.5 cm2
If 9 cm is the diameter, I think the circumference should be 9 times pi centimeters, which is approximately 28.274333882308139146163790449516 centimeters for the circumference. *********************************************** The circumference of a circle can be found by multiplying pi ( π = 3.14 ) by the diameter of the circle. Thus: 3.14 x 9 = 28.26cm
The area of a 9-meter diameter circle is 63.617 square meters.
3.14
28.3/pi ie 9 cm
Exact area of the circle: 9*pi inches
The area is 63.617 dm2
Exact area of the circle: 9*pi inches