at0093591
Answered

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Sagot :

Answer:

Length of base (a) = 5 units

Total Surface Area of Pyramid (T.S.A.) = ?

Now,

T.S.A. = Area of four triangles + Area of base

         = [tex]4(\frac{\sqrt{3} }{4})(5^{2}) + 5^{2} = 25\sqrt{3} + 25[/tex] ≈ [tex]68.301sq. units[/tex]

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