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Find the surface area of a triangular pyramid with the numbers 10 ft, 11 ft, 12 ft

Find the surface area of a triangular pyramid with the numbers 10 ft, 11 ft, 12 ft-example-1
User Craques
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Don’t really got a good look at your picture but a triangular pyramid with a length of 12 feet, width of 10 feet, and a height of 11 feet would be 390.30.
User Bison
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