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I was reading an engineering book.

It says " A turbomachine with symmetrical velocity triangles...". I personally felt more naturally right away to say symmetric velocity triangles.

What is the difference? if there is one at all.

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  • $\begingroup$ english.stackexchange.com/questions/65891/…). $\endgroup$
    – user694818
    Jan 15, 2021 at 19:45
  • $\begingroup$ I think they are synonyms. Wikipedia lists "symmetrical" as a definition of "symmetric". $\endgroup$
    – angryavian
    Jan 15, 2021 at 19:45
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    $\begingroup$ Symmetric is more usual in this context, but they are synonymous. $\endgroup$ Jan 15, 2021 at 19:47
  • $\begingroup$ It seems that the ESE reference contradicts the usage you see in this engineering book. Looking at a "usage over time" it appears that "symmetrical" reached its height of popularity in the mid 20th century, while "symmetric" has more recently reached a height of popularity... $\endgroup$
    – abiessu
    Jan 15, 2021 at 19:47
  • $\begingroup$ I saw the post on the english SEx, but thought of asking to the mathematicians. As math requires rigorous definitions. $\endgroup$
    – RMS
    Jan 15, 2021 at 19:48

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