Hand-me-down projects are so much fun to work with. I try to approach them with an attitude of curiosity: What can this be?
Still thinking on this, but in the meantime I can start ironing those half square triangles open and squaring them up.
It will be exciting to see what happens next.
Wedding Dress Blue 
I always enjoy your solutions to the scraps I have in my container! I made Halfway but don’t have them together yet. In fact, I’ve made quite a few of your patterns. Thank you so much for sharing.
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And waiting for my box of triangles! I already found more.