“6.6.2 Even using directed angles, the result fails for nonconvex hexagons. Figuring out why may help you determine how to use convexity here.
6.5.1 Given segments AB and CD, what conditions must the center P of a spiral similarity carrying AB to CD satisfy?”
Kedlaya, Kiran S. Geometry Unbound. 2006. p. 108.
kskedlaya.org
“ *
By space we mean
the collapsible
whirligig
of attention,
the figuring and
reconfiguring
of charges
among orbits
(obits)
that has taken forever”
Armantrout, Rae. “What We Mean.” Versed. Middletown: Wesleyan University Press, 2009. muse.jhu.edu/book/1357. pp. 51-2.
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