Boy, is it dark and miserable here in the Pacific Northwest! I'm going to have to set up a little indoor studio to photograph the blocks.
A triangle. Foundation pieced.
Print or trace the diagram onto your foundation paper. Number and cut out as in the photo.
NB! If you're printing it remember to change the size to 5"x8".
Foundation piece all sections. I iron the solid white side sections onto freezer paper to help them hold their shape.
Trim all seam allowances to 1/4".
Sew together the three inside sections.
Attach the long side section with the irregular edge (marked "R" in the first photo) first.
Attach the other side section.
Finally sew on the little top triangle and remove your foundation paper.