大仙们帮我老师帮忙解决生理问题下这个问题

来源：蜘蛛抓取(WebSpider) 时间：2016-06-18 03:35 标签： 如何帮助客户解决问题
大仙们,随便帮我解一道题.&&&
仔爱鬼0699
一,平行.因为BE平分角ABD,DE平分角BDC,所以∠CDE＝∠BDE,∠ABE＝∠DBE,又因为∠1＝∠2,所以∠ABD+∠CDB=二倍的∠1+∠2,又∠1+∠2=90°,所以∠ABD+∠CDB=180°,互补,所以AB∥CD.二,只需∠DCA=∠BAC三,（1）,平行.过点C作CO∥AB,因为AB∥CO,所以∠ACO=40°,因为∠ACD=100°,所以∠DCO=100-40=60°=∠BDC,所以AB∥ED.（2）,当∠G+∠H=∠F时,GF∥HQ.
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