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In the figure , points G,D,E,F are concy...

In the figure , points G,D,E,F are concyclic points of a cicle with centreC.
`/_ECF = 70^(@)`
m ( arc DGF ) `= 200^(@)`,
find m(arc DE) and m(arc DEF ) .

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The correct Answer is:
`therefore`m(are DEF)=`160^@`
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