The Buckminster Fuller Institute reveals how to be more forward thinking in your Christmas crafts:
Using an online geodesic dome calculator you can calculate easily the number and dimensions of the triangles you need to build the dome. I would strongly suggest to go for the V2 version if you don’t have unlimited time on your hands. As a radius for the dome we went for 25 centimeters (roughly 10 inch) which worked out pretty well after all.
First, cut and bake the 30 triangles you will need to construct the pentagons. You will end up with 6 pentagons that construct the basic structure of your gingerbread geodesic dome.
After the pentagons are tightly held together by the icing, construct them to form the basic structure of the dome. Besides the triangles for the dome, we also baked a circular base to place the dome upon, slightly bigger than the original diameter for the dome.
Read the rest at the Buckminster Fuller Institute