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ABCD is a rhombus and AED is an equilate...

ABCD is a rhombus and AED is an equilateral triangle. E and C lie on opposite sides of AD. If `angle ABC = 78^(@)`, calculate `angle DCE`.

A

`20^(@)`

B

`21^(@)`

C

`22^(@)`

D

`19^(@)`

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The correct Answer is:
B
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