4-2 = Congruent Triangle Theorems
... • In congruent triangles, ALL corresponding sides and angles are congruent. ...
... • In congruent triangles, ALL corresponding sides and angles are congruent. ...
Apollonian network
In combinatorial mathematics, an Apollonian network is an undirected graph formed by a process of recursively subdividing a triangle into three smaller triangles. Apollonian networks may equivalently be defined as the planar 3-trees, the maximal planar chordal graphs, the uniquely 4-colorable planar graphs, and the graphs of stacked polytopes. They are named after Apollonius of Perga, who studied a related circle-packing construction.