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Piyush365
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Asked: 2026-07-31T05:19:53+00:00 In:

Find x in Fig. 5.26.

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The quadrilateral ABCD is cyclic. The opposite angles of a cyclic quadrilateral are supplementary.

So, x + 100° = 180°

Therefore, x = 80°.

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    1. Since A, B, C and D lie on the same circle, ABCD is a cyclic quadrilateral. In a cyclic quadrilateral, the sum of two opposite angles is 180°.

      Here, ∠D = 100° and ∠B = x.

      Therefore,

      x + 100° = 180°

      x = 180° – 100°

      x = 80°

      Hence, the value of x is 80°.

       

      For more NCERT Solutions for Class 9 Maths Ganita Manjari Chapter 5 I’m Up and Down and Round and Round (2026-27):

      https://www.tiwariacademy.com/ncert-solutions/class-9/maths/ganita-manjari-chapter-5/

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