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