Thank you very much for the clear and pleasing presentation.

If you collect a larger set of proofs without words, it would be very useful for all students (and teachers) of the non-English speaking countries like Iran.

Best Regards
Massoud Raji

Comment by massoud raji — October 15, 2009 @ 10:25 am

I examined and I found the proofs quite successful. Visual proofs are very useful…

Thank you very much for the clear and pleasing presentation.

If you collect a larger set of proofs without words, it would be very useful for all students (and teachers) of the non-English speaking countries like Iran.

Best Regards

Massoud Raji

Comment by massoud raji — October 15, 2009 @ 10:25 am

I examined and I found the proofs quite successful. Visual proofs are very useful…

Comment by esra — December 2, 2011 @ 10:53 pm

Very useful, thanks.

Comment by alex — March 24, 2013 @ 11:33 pm