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I want to write a sentence with math contents.

Figure

X, Y are points, and m is a line.
1. X is the reflecting point of Y with respect to m.
2. X is the reflection point of Y with respect to m.

Which sentence is more appropriate? Or is there any other good expression?

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  • I doubt it's reflective. Is it capable of reflecting light or other radiation? Aug 22, 2017 at 14:03
  • Welcome to English Language Learners Doyun! If you haven't already, please take the tour and check out the help centre.
    – Aric
    Aug 22, 2017 at 14:09
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    I'm voting to close this question as off-topic because it's about domain-specific usages that are only relevant to advanced maths/geometry. Aug 22, 2017 at 14:09
  • X and Y are axially symmetric. m is the axis of symmetry. Aug 22, 2017 at 14:12

1 Answer 1

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We don't really say "reflected point" or "reflection point" instead, we would say one of these:

M is the line of symmetry between X and Y.

Y is the reflection of point X across line M.

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  • @DoyunNam Y can also be called "the (mirror) image of point X". It would seem natural to me to say (but I can't find many Google results that support my intuition) that "X and Y are symmetric with respect to line m". There's another perspective from which you can observe this situation – note that line m perpendicularly divides line segment XY into two equal parts, making it a perpendicular bisector of line segment XY.
    – user3395
    Aug 22, 2017 at 15:19

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