Question

Na figura r//s,determine, em graus, o valor de a+b.

Answer 1

b = 9x

a = 9x

6x + b = 180°

6x + 9x = 180°

15x = 180°

x = 180/15

x = 12°

a = b = 9x

a = b = 9*12

a = b = 108°