Answer:
Question 7
Lateral Surface Area
The bases of a triangular prism are the triangles.
Therefore, the Lateral Surface Area (L.A.) is the total surface area excluding the areas of the triangles (bases).

Total Surface Area
Area of the isosceles triangle:

Total surface area:

Volume

Question 8
Lateral Surface Area
The bases of a hexagonal prism are the pentagons.
Therefore, the Lateral Surface Area (L.A.) is the total surface area excluding the areas of the pentagons (bases).

Total Surface Area
Area of a pentagon:

where a is the side length.
Therefore:

Total surface area:

Volume
