The three contrails in the photo are all young, that is, each of them is just a few minutes of age, and their positions relative the sun are known. Below is a probable solution found with using
suncalc.net to follow the sun azimuth and the FR24 playback to find suitable flight combinations. One of the planes is a private jet, the two others are Swiss A340 (LX39) and Royal Air Maroc B737 (AT810):
Here is a Google Earth view on the three tracks and the Sun from Versailles shortly after the contrail triangle was formed. For simplification, all tracks were raised to the same (average) altitude of 12,000 meters (40,000 ft):
