In the fig., AB || CD. Find the value of x.
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The value of x is 20°
Explanation:
Since AB || CD, ∠ LEF = ∠ EGH
∴ ∠ EGH = 85°
Here, ∠ EGH + ∠ MGH = 180°
⇒ 85° + ∠ MGH = 180°
⇒ ∠ MGH = 180° - 85°
⇒ ∠ MGH = 95°
Again, ∠ MHC + ∠ MHG = 180°
⇒ 115° + ∠ MHG = 180°
⇒ ∠ MHG = 180° - 115°
⇒ ∠ MHG = 65°
From Δ MGH, we get
∠ MGH + ∠ MHG + ∠ GMH = 180°
⇒ 95° + 65° + x° = 180°
⇒ x° = 180° - 95° - 65°
⇒ x° = 180° - 160°
⇒ x° = 20°
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