A geometry problem by Shweta Kumari

Geometry Level pending

ABCD is a parallelogram (name clockwise) , E is a point outside the | |gram such that BCE is an isosceles triangle in which BC= CE now connect the point D to point E, IF ∠ADC=78 degree and and ∠CBE=84 degree then what is the value of ∠DEC? Can this angle calculable exactly?

33 84<∠DEC<33 33<∠DEC<84 84

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