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Sinner Of The System · Answer 1 · 2022-03-23T23:30:01+0000

Answer:

249.6 square units

Explanation:

The surface area of a tetrahedron consists of 4 times the same areas. So we just need to get the area a of the triangle with the given height h = 10.4 and base length b = 12 which is
$a = (b \cdot h)/(2) = 62.4$ . Multiply with 4 to get the whole thing.

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