Development, round II

From: PG Manney <>
Date: Fri Jan 30 19:12:22 1998

> Speaking of polygonical manholes, does anyone know where to get a copy of
> turtle logo for older macs? Or, perhaps even better, a cartridge version
> for one of the 6502 machines (Atari, c64, etc.)? (This is for my niece
> is probably about ready to at least watch logo pgms.)
> At 01:06 PM 1/29/98 GMT, you wrote:
> >indeed round because they then won't fall down the hole if you drop
> >them. But other shapes share this property - triangular manholes are
> You may have triangular manholes (and, I assume, covers), but I disagree
> with the statement that they won't fall in. (Mind you, they may not be
> *likely* to, but that doesn't mean they won't.)
> Consider any regular (is that the right term?) polygon (i.e., all sides,
> angles are equal).
> For an odd number of sides: imagine a line from an angle to the midpoint
> the opposite side. Imagine a second line, from that same angle to either
> end of the opposite side. You've just created a right triangle
> lines, half the opposite side) wherein the first imaginary line *must* be
> shorter than your second line. Put your first line parallel to the
> line up the manhole vertically above the corresponding second line on the
> manhole, and drop.
> For an even number of sides: Do the same thing, only the reverse
> angle and connected side, etc.)
> Oh, make sure there's no one down below before dropping *please*
> --------------------------------------------------------------------- O-
> Uncle Roger "There is pleasure pure in being mad
> that none but madmen know."
> Roger Louis Sinasohn & Associates
> San Francisco, California
Received on Fri Jan 30 1998 - 19:12:22 GMT

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