After cutting the two triangles from corner to corner, I pressed the resulting HSTs while still folded to set the sewing. I then opened up the HSTs, light side to the ironing board, being sure I folded it right on the stitching line, then I put my iron down and Pressed the seam.
I ended up with 6 HSTs... and used only 4 of them....
Of course, I won't have to make pinwheels with HSTs when I make my churn blocks, but
couldn't let them just sit there, could I?
This is a picture after I had sewn 2 sets of 2 HSTs together (top row and bottom row). After I had set the stitching line (while still folded) I opened up the two HSTs and looked at the seams (the straight seams in the middle). By examining the "natural" layout of the seams, I decided to fold them toward the white portions. It was less bulky and Lookie Here..I can now match the final seam with ease.
When I was pinning the squares, I made sure the meeting midpoint matched. When I decided the size of squares at the beginning of this exercise, I really didn't know what I would end up with...I was just practicing..
I ended up with roughly (really rough) 8 1/2" lopadoodled pinwheel. So I used my ruler (above), centered it on the midpoint of the pinwheel,
trimmed, and trimmed,,,,,
and finished with a 8" decent size block