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AHSME 1974 Problem 5

    Given a quadrilateral ABCDABCD inscribed in a circle with side ABAB extended beyond BB to point EE, if ∡BAD=92∘\measuredangle BAD=92^\circ and ∡ADC=68∘\measuredangle ADC=68^\circ, find ∡EBC\measuredangle EBC. (A) 66∘(B) 68∘(C) 70∘(D) 88∘(E) 92∘\mathrm{(A)\ } 66^\circ \mathrm{(B) \ }68^\circ \mathrm{(C) \ } 70^\circ \mathrm{(D) \ } 88^\circ \mathrm{(E) \ }92^\circ

    Dataset text NuminaMath-1.5. Quoted with source.

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