marcellabalbuquerque
marcellabalbuquerque marcellabalbuquerque
  • 01-07-2020
  • Mathematics
contestada

Surface area (picture) help me pls

Surface area picture help me pls class=

Respuesta :

jimrgrant1 jimrgrant1
  • 01-07-2020

Answer:

108 units²

Step-by-step explanation:

The surface area is the sum of the areas of  all the faces

There are 3 rectangular faces ( base, back and sloping face )

There are 2 congruent triangular faces ( sides )

area of base = 8 × 4 = 32 units²

area of sloping face = 8 × 5 = 40 units²

area of back = 8 × 3 = 24 units²

area of triangles = 2 × [tex]\frac{1}{2}[/tex] × 4 × 3 = 4 × 3 = 12 units²

Thus

surface area = 32 + 40 + 24 + 12 = 108 units²

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