Circumference = 2 * pi * s
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velocity: v = 121 m/s radius: r = 4230m circumference: C = 2 * (pi) * radius = ~26578m time: t = s/v = distance travelled / velocity = circumference / velocity = 220 s
A hexagon is divided into 6 equilateral triangles; the circle around the hexagon has a radius the length of one of these triangles. So the circumference is S x 2pi, s being the side of the hexagon. The perimeter of the hexagon is 6s. So the relationship is that you multiply it by 1/3 pi
A circle with a radius of 17.2 units has an area of 929.41 square units.
It is the radius of the circle
If you draw a line from the center of a circle to the edge of a circle, you have drawn the radius of the circle. If you draw a line from the edge of a circle through the center of the circle and on to the edge on the opposite side, you have drawn the diameter of a circle. The radius of a circle is one half the diameter of a circle.