Respuesta :

nktselepov

If the surface is rectangular, then

[tex]S=ab(a-length, b - width)[/tex]

If the surface is square, then

[tex]S=a^2[/tex]

If the surface is triangular, then

[tex]S=\frac{ah}{2}(a-the \:biggest\:side, h-height)[/tex]

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