To solve this, we are ggoing to use the formula below:
[tex]T.S.A=A+\text{ }\frac{1}{2}ps[/tex]
where A is the area of base
P is the perimeter of base
s is the slant height
From the diagram given,
Area of the base which is the area of the square is given by
A= 5 x 5 = 25 cm²
Area of the four triangles is given by
[tex]Area\text{ of the 4 triangles = }\frac{1}{2}\times5\times8\times4[/tex]
[tex]=80cm^2[/tex]
[tex]T\mathrm{}S\mathrm{}A=25+80=105cm^2[/tex]
