Science Talk Science Talk    FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Forums Science Forums Biology Math Astronomy Physics Technology Chemistry Social Sciences History Psychology Philosophy Sociology Linguistics Religious Studies Economics Man Woman Ethno Ask an Expert World Records Society Issues Education People Alternative Science hi,friends(4)          Science Talk Forum Index -> Mathematics View previous topic :: View next topic   Author Message China -->hk Guest Posted: Sun May 27, 2007 10:36 am    Post subject: hi,friends(4) hi,friends: help please. a quadrilateral ABCD which inscribed in a circle,side AB and side DC meet at(intersect) point E, side AD and side BC meet at(intersect) point F. Bisector line of angle E and bisector line of angle F meet at point P. How can we use VECTOR proving PE perpendicular to PF? thanks in advance, Back to top   Ads Advertising Sponsor Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         Science Talk Forum Index -> Mathematics All times are GMT Page 1 of 1   Jump to: Select a forum Science Talk----------------Science TalkAstrologyNanotechnologySETISociology-- Elections-- LibertarianCreationismMathematicsPolitics  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Australian Debt Consolidation Experts medical insurance Wedding Search Escorts and girls (incall/OutCall) online with Oasi2000, ItaliaChiamami, BestAnnunci... Sex Pals DMOZ Talk car insurance quotes Make Your Own Website Cheap phone calls to Canada Cleaning Service toxic mold UK Swingers Genuine Contacts Site cleaning supplies Eureka Vacuum Parts 192 Attacks blocked Powered by phpBB © 2001, 2005 phpBB Group