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CBSE Class 9 Answered


In the figure, O is the centre of the circle and begin mathsize 12px style angle space AOC space equals space 160 degree. space Prove space that space 3 angle space straight y space minus space 2 angle space straight x space equals space 140 degree end style.



Asked by Topperlearning User | 04 Oct, 2017, 01:55: PM
Expert Answer

Since, angle at the centres is twice the angle at the remaining part of circumference.

Answered by | 04 Oct, 2017, 03:55: PM
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begin mathsize 12px style increment space ABC space and space increment space ADC space are space two space right space triangles space with space common space hypotenuse space AC. space Prove space that space angle CAD space is space equal space to space angle CBD. end style
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