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\begin{array} { l } { \text { In Figure } 11 , \text { AD and CE are respectively perpendiculars } } \\ { \text { to sides } B C \text { and } A B \text { of } \Delta A B C \text { . } } \\ { \text { If } \angle E C D = 45 ^ { \circ } , \text { find } \angle B A D \text { . } } \end{array}

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