find out the value of x
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Draw EF || AB || CD
< BAE + < AEF = 180° [ Sum of interior consecutive angles ]
66° + < AEF = 180°
< AEF = 112°
Similarily,
< CEF + < ECD = 180°
< CEF + 52° = 180°
< CEF = 128°
n = < CED + < AEF
= 112° + 128° = 240°
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