Posted by KKO on November 13, 2002 at 16:58:14:
In Reply to: Re: Parallel = Perimetre posted by KKO on November 13, 2002 at 16:54:03:
: : Perimeter
: : Definition: The perimeter of a shape of figure is the total length of the edges of that shape or figure : in other words, the total distance around the shape.
: :
: : Circumference is defined as the perimeter of a circle.
: : Perimeter is associated with a shape (2-D). And it is fixed for a given shape.
: : So when you ask question about the perimeter of "sphere or spheroid" (3-D object)- I am not sure about your reference.
: If you start at the equator, go up to the pole (along one meridian), go all the way down to
: the other pole (on the opposite side's meridian) and back up the original meridian to the
: equator, that would be the perimetre of the ellipse running along that meridian, right?
: So what I'm asking is if you stood at (say) latitude 41°, if you walked all the way around
: the sphere/spheroid (along latitude 41°), would that be the perimetre of latitude 41° and
: (if so) would it also be considered the perimetre of the sphere/spheroid (or just of that
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: latitude's semi circle)? Or does it have to be around a great circle/ellipse of the
: sphere/spheroid?
Make that "would it also be considered *a* perimetre of the sphere/spheroid".
: -KKO