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searching for Incircle and excircles 4 found (18 total)

Tangent circles (358 words) [view diff] exact match in snippet view article find links to article

on the tangency of the nine-point circle of a triangle with its incircle and excircles Descartes' theorem Ford circle Bankoff circle Archimedes' twin circles

Nine-point circle (2,094 words) [view diff] exact match in snippet view article find links to article

{PB}}^{2}+{\overline {PC}}^{2}+{\overline {PH}}^{2}=4R^{2}.} The centers of the incircle and excircles of a triangle form an orthocentric system. The nine-point circle

Feuerbach point (1,129 words) [view diff] exact match in snippet view article find links to article

Feuerbach's theorem: the nine-point circle is tangent to the incircle and excircles of a triangle. The incircle tangency is the Feuerbach point.

Triangle conic (1,379 words) [view diff] exact match in snippet view article find links to article

Incircle and excircles