CBSE Class 9 Answered
Find value of x if o is center
Asked by yogeshthakur3300 | 28 Dec, 2018, 08:24: AM
Expert Answer
From the diagram (vi)
Angle CAB = 40º
Arc CB = 2 × 40º = 80º Angle subtended by an arc
Angle BCA = 80º
Arc AB = 2 × 80º = 160º Angle subtended by an arc
Arc CB + Arc AB + Arc DAB = 360º
80º + 160º + Arc DAB = 360º
Arc DAB = 120º
Angle BCD = x = 1/2 × 120º = 60º
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