Eight sided dice can be described as two square based pyramids stuck together at the bases. Their faces are equilateral triangle
s. If the edge of one die is 2 mm, find the difference in materials cost between a solid gold die and a "gold" painted plastic die. Gold costs $40.38 per gra. Gold weighs .02 grams per cubic mm. Plastic costs $10 per gram. Plastic weighs .01 grams per cubic mm. "Gold" paint costs $.01 per square mm.
