Start by cutting squares. 3", 2 1/2", 2", 1 1/2" (If you cut four each you'll get eight trees)
Now cut those squares in half diagonally to make triangles.
Starting with the largest triangle, cut the tips off. The tip of the largest triangle is used for the top of the tree and measures about 3/4" tall.
Run a line of glue along the top edge. I don't normally glue up projects like these, but they'll want to slide.
Place the next largest on top of the base piece and continue until you'll assembled your tree. Add a small scrap of brown for the trunk.
I let these set up for about an hour and then fused as follows.
Suggested uses: These make great plate focals. Add a bail for an easy ornament or window hanging.