What a mystery and thanks for coming back to us.
I think it is an 8-ray star, probably one fabric for the star. The triangle pieces would fill in the sides and those kite shaped ones would make the corners a square instead of octagons. So you'd have a blue star with red alternates and a red star with blue corners, but you certainly have a lot of that ribbon fabric without it's other half.
Personally, I'm not seeing the vision with just those 3 fabrics. If I used them, I'd probably do two different projects. Those red and blues could alternate and be made into sweet sashing for maybe 30s fabric if you didn't want to do stars.
And then I'd concentrate on the ribbon fabric for it's own top. Or I might just re-donate them for someone else to play with!