It's somewhat complicated. Here it is in full detail:
-- Take the length of the diameter.
-- Either divide the diameter by 2, or else multiply it by 0.5 . The choice is yours.
-- You now have the length of the radius.
The radius is the distance from the center to the outside. The diameter is the distance from the outside to the outside, passing through the center - in other words, twice the radius.
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.
to determine the radius if you only have the diameter, you divided the diameter by 2. then there you have it ! you have the radius !
The area of a circle if the diameter was s 7ft is 38.48ft
The Moon's diameter is 2,159 mi (3,475 km).
s the equator and the diameter the same thing?
Only circles (or spheres) have a diameter
Only circular shapes have diameter not Squares.
Multipy by 2 for the diameter
circumference = pi*diameter
The radius is half the diameter.
If you have only the arc length then you cannot find the diameter.