Discussion:  All Topics 
Topic:  Common Tangent Construction 
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Subject:  RE: Common Tangent Construction 
Author:  Tup 
Date:  May 10 2006 
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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