Respuesta :

Catya
The surface area is the sum of the areas of all sides.

area of two triangle end pieces:
(1/2)(9)(15) + (1/2)(9)(15) = 135

area of front rectangle piece:
(17.4)(16)  = 278.4

area of bottom rectangle:
(15)(16) = 240

area of back rectangle:
(9)(16) = 144

Total surface area:
135 + 278.4 + 240 + 144 = 797.4 m²

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