Chrome，
QQ浏览器
.
![29分钟学完相似三角形所有模型[初三数学09]](http://imgshow.1ydt.com/img?url=%2F%2Fi0.hdslb.com%2Fbfs%2Farchive%2Fa91b02878eacf60a12a0cf951bc12d1f8722ab7f.jpg%40672w_378h_1c_%21web-search-common-cover)
![人教数学九下27.1.1章前引言及相似图形[唐老师]【市一等奖】优质课](http://imgshow.1ydt.com/img?url=%2F%2Fi1.hdslb.com%2Fbfs%2Farchive%2F0cc989761d5a655bb06ca4232b874cfa407ff19c.jpg%40672w_378h_1c_%21web-search-common-cover)
![[八上]含二倍内角三角形三边关系(二倍角用法之一|不用勾股与相似)](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F55e64c805a7c37348762066ba930de3be9f22b13.jpg%40672w_378h_1c_%21web-search-common-cover)
.