Respuesta :

Step-by-step explanation:

1)

Add areas of triangle and rectangle:

  • 1/2*6*4 + 6*7.5 = 57 ft²

2)

Subtract the areas of two rectangles:

  • 9*10 - 6*(9 - 2) = 48 cm²

3)

  • 20*25 = 500 in²