When it comes to "Angel Investors"

[Cristo Heatherdale]

This would be a bit of a broad topic, but I wanted to see if I could get some generalized ideas.  I have heard of people starting out with investing in real estate with the help of an "angel investor".  More times than I thought I would hear, they were people not in their family or direct initial affiliation.  I can hear that they had it, but never seen nor went into the process or agreements.  I haven't even had to service clients that had this help yet.  So for someone that has not done say, a fix and flip but is well versed in home remodeling and construction (you might notice that this is a live current developing situation for someone I know).  What kind of agreements would they expect from an "angel investor" that is offering to bring them "under their wing" for their first couple deals? What would they have to look for in these agreements to protect themselves if any?  I guess if anything, how would a typical scenario go where an "angel investor" is involved.