Question

please solve it urgently​

Answer 1

$\huge\star\pink{ans.}$

given

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AB||CD

/_BAD=57°

/_ECD=30°

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FIND

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/_DEC=/_x=??

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solve

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when AB||CD and AD transversal

/_BAD=/_EDC=57°(alternate angle)

in ∆ECD

/_EDC+/_DEC+/_ECD=180° (∆trangle total angle)

57°+x+30°=180°

x=180°-87°=93°

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x=93°

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