Question

In figure, ZAOC and ZBOC form a linear pair. If - 2b = 30°. Find a and b.​

Answer 1

Correct option is

A

a=130

∘

,b=50

∘

∠AOC and ∠BOC form a linear pair.

∠AOC=a and ∠BOC=b

∴ a+b=180

o

[ Linear pair ] ------ ( 1 )

⇒ a−2b=30

o

----- ( 2 )

Subtracting equation ( 2 ) from ( 1 ) we get,

⇒ 3b=150

o

⇒ b=50

o

Substituting value of b in ( 1 ) we get,

⇒ a+50

o

=180

o

∴ a=130

o

hope it helps you !!!!!!