I searched online for geodesic domes so I wouldn't have to do all the math myself. I found a suitable one that people suggested homeless people use as emergency shelter, then scaled it down and added squares on the bottom.
For this project, I used:
pen or pencil
white school glue
clear spray primer and top coat
white spray paint
metallic spray paint (in two colors I happened to have)
black and white acrylic paint
metal powder mixed with white glue (use metallic paint if you have it; i didn't)
chopstick, napkin, and tape (use a round brush if you have one)
large crappy paintbrush
Step 1: Measure and cut triangles and squares
30 AAB triangles
10 BBB triangles
10 B squares
In this case, A measured 10 7/16 inches and B measured 12 inches.
I drew 1 inch flaps outside the edges of the triangles and squares (skipping the corners, as shown) so I could attach things together on the inside of the dome.
I left out three of the BBB triangles to make two windows and the top of the door for this project, and one of the B squares.
I suggest holding a ruler tightly while you slice along the outline of your shapes with a box cutter. Remember to cut outside the flaps, not inside them along the triangle or square. It helps to cut one and use it as a guide to trace the others, then cut the rest along the pencil lines, rather than measuring every time.