如图,在Rt△ABC中,∠C=90°,BD是角平分线,点O在AB上,以点O为圆心,OB为半径的圆经过点D,交BC于点E.
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3.6×0.25
99×1.83+1.83
12.5×0.78×0.8
3.67÷0.25÷40.