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)
The number of lateral faces in a triangular pyramid is 3, in a pentagonal pyramid is 5.
Therefore, the total number of lateral faces in two triangular pyramids is 2 * 3 = <<2*3=6>>6.
And the total number of lateral faces in one pentagonal pyramid is 1 * 5 = <<1*5=5>>5.
Altogether, there are 6 + 5 = <<6+5=11>>11 lateral faces. Answer: \boxed{11}.