Yukarıdaki üçgende DE//BC olmak şartıyla[br][url=https://www.matematiknehri.com/wp-content/uploads/2017/02/benzerlik-teoremi-tan%C4%B1m.png][img width=170,height=46]https://www.matematiknehri.com/wp-content/uploads/2017/02/benzerlik-teoremi-tan%C4%B1m.png[/img][/url]