Respuesta :

mlarsen5000

Answer:

135 cm²

Step-by-step explanation:

(18+12)/2=15

15x9=135

Wonderhoof

Answer:

135cm²

Step-by-step explanation:

It's a trapizoid so the formula would be

A = 1/2h(b+b)

A =0.5×9(18+12)

A = 4.5(30)

A = 135cm²

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