how to braille words in place of the braille for shapes- In Nemeth or not?

[Cheri A. Wales]

Hello.  I'm confused how to handle words that replace math shape items (ray, angle, triangle, etc.). If I want to braille words in place of geometric shapes such as "triangle ACD equals triangle DEF", what is the rule regarding words before a letter combination like I used the word triangle? I'm feeling really mixed up by the materials I have and I've looked through the Guidelines and I can't find it.  Do you know what section of the Guidelines covers this? What if the geometric term is plural (e.g. "Triangles ACD, DEF, and XYZ are all right triangles.")?

Thank you,

Cheri W.

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