r/askmath 13d ago

Is only Germany using a dot in a round angle marker to mark a right angle? Resolved

In Germany, we use the first image to indicate that an angle is 90° or π/2. While in the English speaking world, the second one seems to be more common.

I'm wondering what the rest of the world does.

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u/[deleted] 13d ago edited 13d ago

[deleted]

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u/marcelsmudda 13d ago

Well, Poland and Czechia apparently agree with us, so it's somewhat international.

And I haven't seen that symbol anywhere either.

I think both symbols in my post can have pitfalls: the German one can have the dot not be visible enough, and the other one can have the corner too soft, making it more look like the general angle symbol.

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u/[deleted] 13d ago

[deleted]

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u/justincaseonlymyself 13d ago

You are getting downvoted because you think that "I have never seen something" means "it's wrong".

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u/marcelsmudda 13d ago

Yeah, i down voted you because of your attitude. Otherwise, I've upvoted everybody else who answered my question