Option A:
The area of the base of the triangular prism is 6 ft².
Solution:
The base of the triangular prism is triangle.
Base of the triangle is 4 ft.
Height of the triangle is 3 ft.
Area of the base of the prism = Area of the triangle
= [tex]\frac{1}{2} bh[/tex]
[tex]$=\frac{1}{2}\times 4 \times 3[/tex]
Area of the base of the prism = 6 ft²
The area of the base of the triangular prism is 6 ft².
Hence option A is the correct answer.