A diametric projection is said to be trimetric projection when
Which of the above is true?
Ans is C option;
https://books.google.co.in/books?id=3AQFN4IzBAoC&pg=PA138&lpg=PA138&dq=A+diametric+projection+is+said+to+be+trimetric+projection+when+i.+two+of+the+three+foreshortening+factors+are+equal+and+third+is+arbitrary.+ii.+all+of+the+three+foreshortening+factors+are+equal.+iii.+all+of+the+three+foreshortening+factors+are+arbitrary&source=bl&ots=Jzqx_ElOvB&sig=ACfU3U0EcFRYdLH3Q3YZoKHfZb7gsT8TDQ&hl=en&sa=X&ved=2ahUKEwjYrPSKgufiAhUFXisKHSKGBX8Q6AEwA3oECAkQAQ#v=onepage&q=A%20diametric%20projection%20is%20said%20to%20be%20trimetric%20projection%20when%20i.%20two%20of%20the%20three%20foreshortening%20factors%20are%20equal%20and%20third%20is%20arbitrary.%20ii.%20all%20of%20the%20three%20foreshortening%20factors%20are%20equal.%20iii.%20all%20of%20the%20three%20foreshortening%20factors%20are%20arbitrary&f=false
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