10. In the parallelogram ABCD, AB = b and AD = d. Also... (vector math)

W

Wiz

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Can someone give me some pointers? I had thought about it for a while but I could not seem to think of the solution.

Question in attachments.
 

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Wiz said:
Can someone give me some pointers? I had thought about it for a while but I could not seem to think of the solution.

Question in attachments.
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attachment.php

Start with the fact that ADE, EFB and FDC are similar triangles - hence their sides are proportional.
 
Subhotosh Khan said:
attachment.php

Start with the fact that ADE, EFB and FDC are similar triangles - hence their sides are proportional.
Click to expand...

Right, I finished question a for the calculation but how can I 'explain'? Thanks
 

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