The approximate surface area of this right triangular prism is 193.2cm
Surface area of prism
The surface area of a triangular prism is expressed as:
Surface area = (Perimeter of the base × Length of the prism) + (2 × Base Area)
Perimeter of the base = 6 + 6 + 6
Perimeter of the base = 18cm
Length of the prism = 9cm
Base area = 1/2 * 5.2 * 6
Base area = 15.6cm
Determine the surface area
Surface area = (18 * 9) + 2(15.6)
Surface area = 162 + 31.2
Surface area = 193.2 cm
Hence the approximate surface area of this right triangular prism is 193.2cm
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