Radius of a circle= Perimeter of the circle/2*pi Radius is half the diameter Radius is the length of a straight line from the center point of the circle to the edge of the circle.
If it is a 7.1 cm radius circle, then its radius is exactly 7.1 cm!
If the circumference of a circle is 132cm its radius is: 21.01 cm
The diameter of a circle is twice the radius. A circle with a radius of 9 would have a diameter of 18. (9*2=18).
If a circle has a circumference of 16 cm then the radius is about: 2.546 cm
A = 1,257 cm2
Radius = Diameter/2 = 10 cm
WOW really? It would be 20cm
A circle with a radius of 10 cm has an area of 314.16 square cm
The Diameter is the distance from one side of the circle all the way to the other side. The Radius is half the distance in a circle. Simply put: 40cm = Diameter 20cm = Radius (Half the distance) :)
When the angle is measured in radians arc_length = angle x radius. So, 20cm = angle x 12cm => angle = 20cm / 12cm ~= 1.67 radians
The surface are of a cylinder whose radius is 10cm and height is 20cm is 1884.96cm2
20cm 8 inches
The formula for the circumference of a circle is C = 2Ï€r, where C is circumference, Ï€ is pi (approx. 3.142), and r is the radius. So, for a circle with a radius of 6cm, C = 2(3.142)(6cm) = 18.852cm Rounding to the proper number of significant figures, this answer would be 20cm.
This cannot be properly answered because a 20 cm radius equates to a 40 cm diameter. Also, a 50 cm diameter means a 25 cm radius.
A circumference of 62.8cm