The lateral area includes the areas of the sides but not the pentagonal base. Each side is in the shape of a triangle. The formula for the area of a triangle is:
Area = (1/2)·base·height
The triangle's base is one of the sides of the pentagonal base, so its length is 4 units. The height is the slant height, which is given as 6 units. Plug those numbers into the area formula above to find the area of one triangle. Now, how many triangles are there? Multiply the area of one triangle by the number of triangles to get the lateral area. Remember to include square units on the answer.
