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Old November 18th, 2008, 06:33 PM
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Default Help prove the following is true.

Prove that BC = 2XY




Thanks in advance =]
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Old November 18th, 2008, 06:35 PM
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I think you need to prove that they are similiar triangles not sure though
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Old November 18th, 2008, 06:36 PM
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Sorry, picture is uploaded now
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Old November 18th, 2008, 06:45 PM
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Default geometry 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




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Old November 18th, 2008, 06:56 PM
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hmmm

more help is appreciated =]
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Old November 18th, 2008, 07:50 PM
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they're similar by SAS
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Old November 19th, 2008, 06:40 PM
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Default grometry 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


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