The pieces that you have cut now
These are the three pieces that you cut that are all the same length. From the narrow board you have two 8" pieces that will be the sides. From the medium board you have one 8" piece which is one side of the roof. From the wide board you have two 8" pieces. One of these is the base and the other one is part of the roof.You still have pieces of the wide and narrow boards that you will cut pieces out of.