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andreev551 [17]
3 years ago
12

ASAP HELP PLEASE:

Mathematics
1 answer:
stealth61 [152]3 years ago
4 0
We know that

[Surface area ]=[the area of  4 triangles]+[the area of square base]

[the area of square base]=8*8--------> 64 ft²

[the area of 1 triangle]=(1/2)*b*h
b=8 ft
How the angle is 45°------->  h=b/2-------> h=4 ft

then
[the area of 1 triangle]=(1/2)*8*4------> 16 ft²
and 
[the area of 4 triangles]=4*16--------> 64 ft²

[Surface area ]=[64 ft²]+[64 ft²]----------> 128 ft²

the answer is 128 ft²
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