కింది చిత్రంలో, M అనేది YZ మధ్య బిందువు \(\overline {YZ} ,\;\angle XMZ = 32^\circ,\) మరియు ∠XYZ = 16°. అయితే, ∠XZY విలువ:

RRB Group-D 27th Sep 2018 Shift 1 28Q.docx 1

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RRC Group D Previous Paper 9 (Held On: 27 Sep 2018 Shift 1)
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  1. 68°
  2. 84°
  3. 81°
  4. 74°

Answer (Detailed Solution Below)

Option 4 : 74°
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Detailed Solution

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ΔXYMలో,

∠XYM + ∠XMY + ∠YXM = 180°

⇒ 16° + (180° – ∠XMZ) + ∠YXM = 180°      (∵ ∠XMY + ∠XMZ = 180°)

⇒ 16° + 180° – 32° + ∠YXM = 180°

⇒ ∠YXM = 16° = ∠XYM

∴ YM = XM = MZ      (∵ M అనేది YZ మధ్య భిందువు)

∴ ∠MXZ = ∠MZX = ∠XZY

ΔXMZలో,

∠XMZ + ∠MXZ + ∠MZX = 180°

⇒ 32° + ∠MXZ + ∠MXZ = 180°

⇒ 2 × ∠MXZ = 180° – 32°

⇒ ∠MXZ = 74° 

⇒ ∠XZY = ∠MXZ = 74°

∴ ∠XZY విలువ  74°

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