Question

angle AOC and angle BOC form a linear pair. if a- b is equal to 80 find the value of a and b

Answer 1

as according to the question a minus b = 80 degree and A and B form linear pair so a + b = 180 degree so adding the two equations we get 2 x a = 260 degree so a = 130 degree and b = 130 minus 80 = 50 degree

Answer 2

Answer:

let ∠AOC = a

    ∠BOC = b

a + b = 180° ------(1)

a - b =   80° ------(2)

On adding (1) and (2)

a + b + (a - b) = 180° +80°

a + b +a - b = 260°

2a = 260°

a = 130°

if a = 130, then,

130° + b = 180°

∴b = 50° 

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