A circle with a radius of 21 meters has a circumference of 131.95 meters.
C = 131.95 inches.
Diameter of circle: 21/pi = 6.685 units rounded to 3 decimal places
The perimeter of a cirlcle is its circumference which is: 2*pi*radius or diameter*pi
Area of a circle = pi*radius2 in square units
21/(2*pi) = a radius of about 3.342253805 units
Circumference = 2Ï€r = 42Ï€ so r = 21 units.
Remember the circle eq'n ;- C = 2 pi r Hence When r = 21 C = 2* 3.14 * 21 = C = 131.88 units.
A circle with a radius of 21 inches has a circumference of 131.95 inches.
A circle with a radius of 21 meters has a circumference of 131.95 meters.
The circumference is 42pi, or approximately 131.946864
C = 131.95
The radius of any circle is the straight line distance from the centre of the circle to any point on the circumference of the circle. The radius being 21 cm makes no difference to the definition of the radius; it just means that the straight line distance from the centre of that circle is 21cm away from any point on the circumference of that circle. The radius of a circle with a radius of 21 cm is 21 cm.
the radius is 10.5 inches. * * * * * Wrong! Circumference = 2*pi*Radius Or, Radius = Circumference/(2*pi) So circumference = 21 inches implies radius = 3.34 inches (to 3 sf)
A circle with a radius of 21 units has an area of 1,385.44 square units.
65.94 feet
Circumference of circle: 360/21 times 25 = 3000/7 Radius of sector: (3000/7) divided by (2*pi) = 68 units to the nearest integer