I think I found the answer. Select your shape, then go to "object" and "corner options".
Lol I answered my own question!!
You'll never get better with the pen tool unless you practice.
All though is is for Illustrator the same principles apply to InDesign and Photoshop
not so fast: what if you want only the first point or top of the triange rounded:
goto window/automation/scripts and if you installed the scripts from the disk or copied them from prev version then you will find cornerEffects.jsx using that gives a lot more control