Let A', B'
and C' be the contact points between the three Malfatti
circles. The lines AA', BB' and CC' concur at the first Ajima-Malfatti
point. It is the point X(179) in ETC.
Let EA, EB and EC be the excenters. The lines EAA', EBB' i ECC' concur at the second Ajima-Malfatti point. It is the point X(180) in ETC.