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What is the surface area of this triangular pyramid?

What Is The Surface Area Of This Triangular Pyramid class=

Answer :

HAMED313IN

Answer:

[tex]3 \times (0.5 \times 3 \times 3) + 0.5 \times 2.5 \times 3 = \\ 13.5 + 3.75 = 17.25[/tex]

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