Question

ange AOC and angle BOC forms a linear pair. if a-2b=30 degree , find 'a' and 'b'

Answer 1

as angle aoc and angle boc forms a linear pair that means angle a plus angle b=180 degree

a+b=180

a=180-b

putting a value in a-2b=30

180-b-2b=30

-3b=-150

b=150,putting its value in a+b=180

a=30

Answer 2

a=180-b

180-b-2b=30

180-3b=30

180-30=3b

150=3b

50=b

a-2(50)=30

a-100=30

a=100+30

a=130

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