The surface area of a triangular prism can be calculated by finding the lateral area of the rectangular sides and the area of the two triangular bases.
The lateral area of the rectangular sides is found by multiplying the sum of the lengths of the rectangles by the width:
2.5 cm + 3 cm + 2.5 cm = 8 cm
8 cm * 1 cm = 8 cm²
The area of the two triangular bases can be found by multiplying the base by the height, and dividing by 2 (for each triangle):
3 cm * 2 cm / 2 = 3 cm * 1 cm = 3 cm² for each triangle
2 triangles * 3 cm² = 6 cm²
Therefore, the total surface area of the triangular prism is 8 cm² (lateral area) + 6 cm² (two triangular bases) = 14 cm².
The correct answer is:
14 cm²