There is a row of two triangular, pyramids, and one pentagonal pyramid, and a display at a museum. How many lateral faces are there altogether?

Answer 1

To calculate the total number of lateral faces, we need to find the number of lateral faces for each type of pyramid and then add them up.

Two triangular pyramids each have 3 lateral faces, so the total number of lateral faces for triangular pyramids is 2 * 3 = <<2*3=6>>6.

One pentagonal pyramid has 5 lateral faces.

Therefore, the total number of lateral faces is 6 + 5 = <<6+5=11>>11. Answer: \boxed{11}.