Respuesta :

mathecoach

a)

1/2·(6 + x)·4·4 = 88 --> x = 5 cm

(6 - x)^2 + 4^2 = 4.12^2 --> x = 5.013 cm

b)

4·1/2·(6 + 5)·4 + 2·(4 + 6 + 4.12)·4 = 201.0 cm²