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TeffalHead FatBody has stayed out too late on the planet
BadTrash and is in danger of being consumed by a Larger
BageGarLectorCol.
To get to safety TeffalHead must get
to base A or base B or the ZoomTube that connects them.
He knows his own position, C, and the ZoomTube is a
perfectly straight line between A and B (woe betide a
zoomer in a curved ZoomTube).
TeffalHead needs to know
immediately which he is closest to, A, B, or some point
on the ZoomTube between A and B.
TeffalHead knows the xycoordinates of points A, B, and
C.
Like any good robotminded soul, he expects to trans
late and rotate the xycoordinate system to make a new
x'y'coordinate system in which A has x'y'coordinates
(0,0) and B has x'y'coordinates (L,0), where L is the
distance from A to B.
Then the answer can be easily
read from the x' coordinate of C.
Unfortunately, living up to his first name, which means
`forgetful in emergencies', TeffalHead has forgotten the
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 Spring '11
 k.v.arya

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