tag:blogger.com,1999:blog-1675971453457760.post7458751928986166081..comments2024-03-26T13:28:19.540+05:30Comments on Mathematics Academy: Cyclic Quadrilateral - Exterior AnglesSanjay Gulatihttp://www.blogger.com/profile/02778697576673777994noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-1675971453457760.post-20165181559932017482011-08-17T08:33:20.859+05:302011-08-17T08:33:20.859+05:30DE is anti-parallel to BC (by definition)DE is anti-parallel to BC (by definition)Pravinhttps://www.blogger.com/profile/05947303919973968861noreply@blogger.com