AB为圆心O直径,弦CD垂直AB,M为弧AC上一点,AM延长线交DC延长线于E,则可能成立的是A 角AMC=角DCMB 角A=角EC 角EMC=角AMDD 角ECM=角AMD
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![AB为圆心O直径,弦CD垂直AB,M为弧AC上一点,AM延长线交DC延长线于E,则可能成立的是A 角AMC=角DCMB 角A=角EC 角EMC=角AMDD 角ECM=角AMD](/uploads/image/z/12844746-18-6.jpg?t=AB%E4%B8%BA%E5%9C%86%E5%BF%83O%E7%9B%B4%E5%BE%84%2C%E5%BC%A6CD%E5%9E%82%E7%9B%B4AB%2CM%E4%B8%BA%E5%BC%A7AC%E4%B8%8A%E4%B8%80%E7%82%B9%2CAM%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%BA%A4DC%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%BA%8EE%2C%E5%88%99%E5%8F%AF%E8%83%BD%E6%88%90%E7%AB%8B%E7%9A%84%E6%98%AFA+%E8%A7%92AMC%3D%E8%A7%92DCMB+%E8%A7%92A%3D%E8%A7%92EC+%E8%A7%92EMC%3D%E8%A7%92AMDD+%E8%A7%92ECM%3D%E8%A7%92AMD)
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