Question

na figura R//S//T. Calcule a medida de AB

Answer 1

(2x+1):4=(5x-1):6

(2x+1):2=(5x-1):3

3(2x+1)=2(5x-1)

6x+3=10x-2

10x-6x=3+2

4x=5

x=5/4

x=1,25

AB=2x+1
AB=2(1,25)+1
AB=2,5+1
AB=3,5


Resposta: AB=3,5