The area ratio is equal to the square ratio of sides, which can be proved by an edge triangle. The base and height are both 1:2, so the ratio of small area to large area is 1: 4.

6 2 = above the prism 36, below the prism 15 2 = 225? One? The edge is (root number 3) * (15 2-6 2)/4.

The final total area is equal to 26 1+ (root number 3)* 189.