i used yandex to translate so it might be wrong at some words. If u have trouble understand them ill send u the original language.
Here’s the question:
Let ABC be the pointed triangle with the center of the outer line O. Call A ' the heart of the road
through C and exposure AB at A, call B ' is the center of the path that passes through A and contact BC at B, call
C ' is the center of the road that passes through B and exposes CA at C.
a) prove that the A'b'c'Triangle area is greater than or equal to the ABC Triangle area.
B) Call X, Y, Z respectively the perpendicular projection of O onto the lines a'b', B'c', C'a'.
Know that the XYZ triangle adjoins the straight lines in turn
A 'B', B'C', C' A'at points X', Y', Z' (X' X,Y 'Y,Z' Z). Prove that the
straight line ax', by', CZ' congruent.
. They now have 23