牛求艺认证
(1)8个,分别是△ABE,△ACE,△BCD,△ABC,△COE,△AOD,△AOC,△ACD;(2)A,B,E;∠B,∠BAE,∠AEB;(3)△ABE,△BDC,△ABC;(4)△ADC,△AEC,△ABC,△AOC;(5)AC,DC;(6)AOC;ADC;AEC;ABC.