Well it took Einstein took 3 years to develop GR and the main reason was he had to train himself in Riemannian and differential geometry. He even seek help from mathematicians for that. So he must have known the geometrical aspects of physics.

His work is available online. http://einsteinpapers.press.princeton.edu

You can read it for yourself. It's not that difficult to understand. His writings are very clear and concise. 

Dear Vikash,

I am asking for school course of Euclidean geometry NOT for General relativity, Riemannian or pseudo-Riemannian geometry, non-Euclidean geometry!

How did Einstein understand this Euclidean geometry, its undetermined notions (points, straight lines, planes), undetermined relations (to lie at, between), axioms, rules of proof?  

@ Todd

Thanks I have been looking for such source. But it seems pdf download is not possible?

@ Anatoly

Sorry if I misunderstood you. But are you planning on introducing axioms and other theoretical aspects to school (high school?) students?

There is a print option on the left. You can print to PDF I think.

Dear Mr. Todd J Desiato,

You open a new Internet for me :):) Thank you so much for your reference! Good luck in your research and all the best to you!!

Anatoly Khripov