# Re: Parallel = Perimetre

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Posted by KKO on November 13, 2002 at 16:54:03:

In Reply to: Re: Parallel = Perimetre posted by Subhotosh Khan on November 12, 2002 at 13:22:45:

: 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.

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
latitude's semi circle)? Or does it have to be around a great circle/ellipse of the
sphere/spheroid?

-KKO

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