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White raven [17]
4 years ago
10

Please help me!!!!!!!

Mathematics
1 answer:
dusya [7]4 years ago
5 0

Answer:

  544 units²

Step-by-step explanation:

The surface area is the sum of the areas of the three rectangular faces and the two triangular bases.

  SA = 10×14 +10×14 +12×14 + 2(1/2)(12)(8)

  = 14×(10+10+12) +12×8

  = 448 +96

  = 544 . . . . square units

_____

The area of a rectangle is the product of its dimensions:

  A = LW

The area of a triangle is half the product of its base and height:

  A = (1/2)bh

Here, both triangles have the same area, so we multiplied the area of one of them by 2 to get the area of both of them.

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