I do kind of like Peggy but don't bother with the template. Most PP units that are diagonal will be some form of triangle. I will often figure out how big I need it then cut big rectangles of my fabric and cut them in half again on the diagonal for my odd shaped diagonal piece. If I need a lot, like in NYB points, I will cut a strip that is 3/4" wider than my point unit is tall. Then find the angle and cut over size triangle units from the strip.