Question

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)

Answer 1

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}.