how can i find all the triggers that belong to a table?
Another table that is useful is:
SELECT * FROM user_objects WHERE object_type='TRIGGER';
You can also use this to query views, indexes etc etc
Check out ALL_TRIGGERS:
http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/statviews_2107.htm#i1592586
The following will work independent of your database privileges:
select * from all_triggers
where table_name = 'YOUR_TABLE'
The following alternate options may or may not work depending on your assigned database privileges:
select * from DBA_TRIGGERS
or
select * from USER_TRIGGERS
Use the Oracle documentation and search for keyword "trigger" in your browser.
This approach should work with other metadata type questions.