आकृतीमध्ये, O वर्तुळाचे केंद्र आहे. जर  तर  चे माप शोधा.

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NTPC CBT-I (Held On: 9 Jan 2021 Shift 1)
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  1. 35º
  2. 125º
  3. 55º
  4. 145º

Answer (Detailed Solution Below)

Option 1 : 35º
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RRB Exams (Railway) Biology (Cell) Mock Test
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Detailed Solution

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दिलेल्याप्रमाणे:

संकल्पना:

अर्धवर्तुळात बनवलेला कोन काटकोन असतो.

वर्तुळाच्या समान खंडात तयार होणारे कोन मोजमापाने समान असतील.

गणना:

B आणि R ला जोडून BR तयार होतो.

∠ARS + ∠ARP = 180°  [रेषीय जोडी]

⇒ ∠ARP = 180° - 125° = 55° 

∠ARB = 90°    [अर्धवर्तुळात बनवलेला कोन] 

⇒ ∠ARP + ∠BRP =  90° 

⇒ ∠BRP = 90° - 55° = 35° 

∠BRP = ∠PAB = 35°  [कोन समान विभागात केले]

∴ ∠PAB = 35°

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