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Which of the following can not be a measure of an angle of a cyclic quadrilateral?

  1. 90° 
  2. 150° 
  3. 170° 
  4. 180° 

Answer (Detailed Solution Below)

Option 4 : 180° 
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Detailed Solution

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Concept Used:

The angles of a cyclic quadrilateral are Supplementary. 

Calculation:

The sum of measures of opposite angles = 180° 

⇒ The sum of two angles is 180° 

⇒ Every angle of a cyclic quadrilateral need to be less than 180° 

∴ One angle of a cyclic quadrilateral cannot be 180°.  

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Last updated on Jul 18, 2025

-> A total of 1,08,22,423 applications have been received for the RRB Group D Exam 2025. 

-> The RRB Group D Exam Date will be announced on the official website. It is expected that the Group D Exam will be conducted in August-September 2025. 

-> The RRB Group D Admit Card 2025 will be released 4 days before the exam date.

-> The RRB Group D Recruitment 2025 Notification was released for 32438 vacancies of various level 1 posts like Assistant Pointsman, Track Maintainer (Grade-IV), Assistant, S&T, etc.

-> The minimum educational qualification for RRB Group D Recruitment (Level-1 posts) has been updated to have at least a 10th pass, ITI, or an equivalent qualification, or a NAC granted by the NCVT.

-> Check the latest RRB Group D Syllabus 2025, along with Exam Pattern.

-> The selection of the candidates is based on the CBT, Physical Test, and Document Verification.

-> Prepare for the exam with RRB Group D Previous Year Papers.

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