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Nat2105 [25]
3 years ago
11

Find the total surface area. 8 km 4 km 3.9 km 2 km 8 km

Mathematics
1 answer:
qaws [65]3 years ago
7 0

Answer:

71.2 km²

Step-by-step explanation:

Triangles: 1/2(8)(3.9)=15.6 (2 of them - front and back)

Base: 8x2=16

Side: 4x2=8

Slant:8x2=16

15.6+15.6+16+8+16=71.2

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