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Answer:
∠1 =∠3=60° and ∠ 2=∠8 = 120°.
Step-by-step explanation:
We are given that ∠1 and ∠ 2 are in the ratio 1 : 2
Let the ratio be x
So, the angles are x and 2x
Since ∠1 and ∠ 2 are linear pair
So, ∠1 +∠ 2 = 180°
So, x+2x=180°
3x=180°
x=60°
So, ∠1 =60°
∠ 2 = 2x = 2*60 = 120°
∠1 =∠3 (vertically opposite angles)
∠1 =∠3=60°
Since l || m
So, ∠ 2=∠ 6(Corresponding angles)
∠ 2=∠6= 120°
Now , ∠6 = ∠8 (vertically opposite angles)
So, ∠6 = ∠8 = 120°
Hence ∠1 =∠3=60° and ∠ 2=∠8 = 120°.
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