The surface area of a triangular prism can be expressed as:
\( S.A. = \text{Base Area} + (S1 + S2 + S3) \)
So, the complete formula would be:
The surface area of a triangular prism is \( S.A. = \text{Base Area} + (S1 + S2 + S3) \), where \( S1, S2, \) and \( S3 \) are the areas of the three rectangular faces.