There is a row of two triangular pyramids and one pentagonal pyramid in a display at a museum. How many lateral faces are there altogether?(1 point)
To find the total number of lateral faces, we need to count the lateral faces of each pyramid and then add them together.
Each triangular pyramid has 3 lateral faces.
There are 2 triangular pyramids, so the total number of lateral faces for the triangular pyramids is 3 x 2 = 6.
The pentagonal pyramid has 5 lateral faces.
Therefore, the total number of lateral faces is 6 + 5 = <<6+5=11>>11. Answer: \boxed{11}.