I have really been loving the triangle shape. In fact I am drawing my next bit of inspiration for some drapes from the above photo. The space is designed by Connie Beale and is virtually vintage being that it was published way back in the March 2005 issue of House & Garden. Then the photo right above the bottom one is from Hamish Bowles home and was published a couple years ago in the Vogue Living Australia. I actually posted about it here if you want to see more pictures.
All other sources can be found on my triangles board.