Guest Posted January 28, 2011 Report Share Posted January 28, 2011 B |\ | \ |__\ E| D|\ | | \ x | | \ | | \ C|__|____\A F this problem was posted at math2.org and i thought it a good challange. the three right triangles are similar. (in other words thier sides are porportional.) if given BD, BC and AF, find x (DA). Quote Link to comment Share on other sites More sharing options...
0 Aaryan Posted January 28, 2011 Report Share Posted January 28, 2011 well, dont we need to know BD,BC, and AF? Quote Link to comment Share on other sites More sharing options...
0 Guest Posted January 28, 2011 Report Share Posted January 28, 2011 no, what i'm asking for basically is the formula. ie. find x in terms of those sides. Quote Link to comment Share on other sites More sharing options...
0 curr3nt Posted January 28, 2011 Report Share Posted January 28, 2011 AF^2 + DF^2 = x^2 Using DF = EC AF^2 + EC^2 = x^2 Using EC/BC = x/(x+BD) => EC = BC*x/(x+BD) AF^2 + (BC*x/(x+BD))^2 = x^2 I do not feel like simplifying that... Quote Link to comment Share on other sites More sharing options...
0 peace*out Posted January 28, 2011 Report Share Posted January 28, 2011 *backs away...no...no...NOOOOOOOOOOOOO!!!!!!* guess what im learning in geometry... but anyways, what curr3nt has looks good to me. Quote Link to comment Share on other sites More sharing options...
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B |\ | \ |__\ E| D|\ | | \ x | | \ | | \ C|__|____\A Fthis problem was posted at math2.org and i thought it a good challange.
the three right triangles are similar. (in other words thier sides are porportional.)
if given BD, BC and AF, find x (DA).
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