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masya89 [10]
2 years ago
11

Surface Area of a Triangular Pyramid, please help!

Mathematics
1 answer:
8090 [49]2 years ago
5 0

Answer:

surface area of the triangular pyramid

=(1/2×9×7.8)+(3×1/2×9×12.3)

=35.1+166.05

=201.15 inch²

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