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TOT 137 1987 Spring Main J2 tangentials from cuts of an octagon

Source:

April 17, 2020
octagontangentialcombinatorial geometrycombinatorics

Problem Statement

Quadrilaterals may be obtained from an octagon by cutting along its diagonals (in 88 different ways) . Can it happen that among these 88 quadrilaterals (a) four (b ) five possess an inscribed circle?
(P. M . Sedrakyan , Yerevan)