Math Is Fun Forum

renevanderlende

Member

From: The Netherlands

Registered: 2020-01-06

Posts: 39

Text on a circular path, how to get minimally required r?

Hi All,

I want to place text on a circular path and need to calculate the minimally required radius (r) so all characters fit exactly on the circle.

height of character: y
width of character: x (variable, but considered equal to y for now)
number of characters: n
degrees per character: 360 / n

I could use r = 2y, but that feels like cheating.

How do I calculate the exact value of r?

Update: I think I found it myself

circle circumfence = 2πr
In my case: minimal circumfence = n * x

radius = circumfence / 2π
So minimally required r = (n*x) / 2π

Would that be correct?

Cheers,
Rene

P.S.: I now know how to use trigonometry functions in CSS, should not pose (much of) a problem.

Last edited by renevanderlende (2021-10-24 11:02:18)

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Bob

Administrator

Registered: 2010-06-20

Posts: 10,191

Re: Text on a circular path, how to get minimally required r?

Hi Rene,

Before I read your update, that's what I thought might work.

Good luck with it.

Bob

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