Respostas

2014-08-28T21:31:34-03:00
1) 5^2 = h^2+3^2
    h = √25-9
    h = 4
At = (B+b).h/2
At = 52u

2) At = (B+b).h/2
    At = 427u

3) At = (B+b).h/2
   At = 540u