N nonsenseTM Member Joined May 29, 2009 Messages 151 Gender Male HSC 2010 Apr 22, 2010 #2 use the 2 sets of similar triangles due to parallel lines corres. sides in same ratio-GH/DE=GF/DF CB/DE=AB/AE AB*GH=CB*AE*GF*DE/DE*DF=CB*GF as DE cancels out and AE=DF FG^2=CB*FG as FG=CB hopefully this is clear enough
use the 2 sets of similar triangles due to parallel lines corres. sides in same ratio-GH/DE=GF/DF CB/DE=AB/AE AB*GH=CB*AE*GF*DE/DE*DF=CB*GF as DE cancels out and AE=DF FG^2=CB*FG as FG=CB hopefully this is clear enough
W WEMG Member Joined Aug 15, 2009 Messages 118 Gender Undisclosed HSC 2011 Apr 22, 2010 #3 nonsenseTM said: use the 2 sets of similar triangles due to parallel lines corres. sides in same ratio-GH/DE=GF/DF CB/DE=AB/AE AB*GH=CB*AE*GF*DE/DE*DF=CB*GF as DE cancels out and AE=DF FG^2=CB*FG as FG=CB hopefully this is clear enough Click to expand... Thanks!
nonsenseTM said: use the 2 sets of similar triangles due to parallel lines corres. sides in same ratio-GH/DE=GF/DF CB/DE=AB/AE AB*GH=CB*AE*GF*DE/DE*DF=CB*GF as DE cancels out and AE=DF FG^2=CB*FG as FG=CB hopefully this is clear enough Click to expand... Thanks!
