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dezoksy [38]
3 years ago
5

PLEASE HELP!! WILL MARK BRANLIEST!!

Mathematics
1 answer:
liberstina [14]3 years ago
8 0

Answer:

Surface area of triangular prism =  sum of area of sides

                                                     =  15 × 2 + 120 × 3

                                                     = 30 + 360

                                                     =  390 cm²

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