The 120 degree angle takes as its reference the signs of the same element.
For example: the trine between fire signs, between earth signs, between air signs and between water signs.
Together with the sextile, it is considered a good aspect, and the most fluid of them all, because the points are in an even stronger attunement, bringing more ease and natural talents that can be explored without effort.
The houses involved also take part in this harmonious contact between the two, and reveal the sectors with great cooperation between them.
There are trines that do not fall in signs of the same element, when one of the planets or points is at the beginning of a sign and the other at the end of another sign.