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Topic: Common Tangent Construction


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Subject:   RE: Common Tangent Construction
Author: Tup
Date: May 10 2006
I don't know as accuracy has anything to do with geometric constructions*. In
Mathman's construction #1, the points on the circles determined by the 2
parallel radii will determine a line which is either parallel to the line thru
the centres - or not. (I assume those original radii are not on the line
connecting the centres) If the lines are parallel then the circles are the same
size & a common tangent is trivial. If they are not, then they intersect at some
point P and Mathman's procedure seems dandy.

Gary Tupper
Terrace BC

*The physical drawings are effected by accuracy of the tools - but they are only
models of ideal lines of infinite length (and 0 width),
exact lengths and so on.

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