different questions

[bayan said]

Dear sir,
Thanks very much for replying the last time it was such a brilliant answer.
But now I've several questions,would you mind answering them?
1- I read these phrases "Road observed by radar"-"satallite not programmed"-
in these phrases the verb to be(i.e.is) has been omitted,what's the reason?
2- I read the following sentence in"Time machine":the sentence is:( you learnt geometry at school,all about lines & angles etc..that geometry which you learned was based upon a wrong idea"my question:why didn'tthe writer put commas befor & after the relative clause although this is a non-defining relative clause because when he said"that geometry" he'd just specified it then the following clause is just describing...?
with regards..
Bayan.s

[Tdol]

In signs and things like that, we can omit the verb to save space, as we do in headlines.
I don't like the that geometry which.. phrase. I'd change 'that' to 'the'.