Didier.
exactly what i need.
bless

Amir

Hello there.
Thanks so much for your quick response for my first post here.
here is more nuances for the situation of the angle requested between 2 plans:
(see attached screen shut)
the angle requsted here is "a" .
Dear Didier, your plug in works very good but gives the complete angle which is "b".
sure i can do 180 - b = a (or use the protractor) but it is repatative action and
using a plug in save lot of time. also if the angle is close to 90 degree i have to double check it by using the protractor (because it's hard to distinguish by eye).
generaly, it would be great for a plug in to distinguish between the requested angle (a , b , or c) . maybe i'm asking too much .

the plane_angle.rb (by kaidu) gives a similar result by right clicking on a common edge of two connected plans.

Didier, thanks sooo much for all what you contribute .

Hello everybody.
I'm looking for a plug-in that gives the angle between two selected plans.
I have already found such : ( plane_angle) but it seem not to work on the SU 7.

THANKS
Amir