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 calculate the sum of the lateral faces of each individual pyramid.
A triangular pyramid has 3 lateral faces. Since there are two triangular pyramids, the total number of lateral faces for the triangular pyramids is 3 x 2 = 6.
A pentagonal pyramid has 5 lateral faces. There is only one pentagonal pyramid in the display, so the total number of lateral faces for the pentagonal pyramid is 5 x 1 = 5.
Therefore, the total number of lateral faces for all the pyramids in the display is 6 + 5 = 11.