Prove that BC = 2XY

http://img249.imageshack.us/img249/6103/proofqu2.jpg

Thanks in advance =]

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- November 18th 2008, 06:33 PMferkenHelp prove the following is true.
Prove that BC = 2XY

http://img249.imageshack.us/img249/6103/proofqu2.jpg

Thanks in advance =] - November 18th 2008, 06:35 PMIDontunderstand
I think you need to prove that they are similiar triangles not sure though

- November 18th 2008, 06:36 PMferken
Sorry, picture is uploaded now

- November 18th 2008, 06:45 PMbjhoppergeometry proof
originally posted by ferken

yes the proof is easy.you have two similar triangles and they are in the ratio of 1 to 2

bj - November 18th 2008, 06:56 PMferken
hmmm

more help is appreciated =] - November 18th 2008, 07:50 PMchiph588@
they're similar by SAS

- November 19th 2008, 06:40 PMbjhoppergrometry proof
originally posted by ferken

Additional help requested

the line connecting the midpoints of two sides of a triangle is parallel to the third side. from this you can show that triangle AXY is similar to ABC by angle-angle- angle

bj