What is x?

I can not find out how to solve this can i get help with finding X?
I assume that [imath]x=\|\overline{AO}\|[/imath].
Can you see that [imath]\Delta AOB \approx \Delta COD~?[/imath]
It seems to me there is some bit of information missing.

[imath][/imath][imath][/imath][imath][/imath]
 
I assume that [imath]x=\|\overline{AO}\|[/imath].
Can you see that [imath]\Delta AOB \approx \Delta COD~?[/imath]
It seems to me there is some bit of information missing.

[imath][/imath][imath][/imath][imath][/imath]
There is not enough info to "fix" the shape, but enough to find x - the relationship derived from the triangle similarity remains if the overall shape changes.
 
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