Question

In the above figure, ∠POR and ∠QOR form a linear pair. If a - b = 80°, find the value of a.
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Answer 1

Answer:

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Answer 2

Answer:

a+b=180 (Eq. 1)

also

a-b=80°

a=80+b (Eq. 2)

So,use value of a from (Eq. 2) in (Eq. 1)

80+b+b=180

2b=180-80=100

b=100÷2

b=50°

Therefore the angles are

b=50°

a=b+80=50+80=130°

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