User talk:Guyalef

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Hello, Guyalef, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are a few links to pages you might find helpful: Please remember to sign your messages on talk pages by typing four tildes ( ~ ); this will automatically insert your username and the date. If you need help, check out Questions, ask me on my talk page, or ask your question on this page and then place  before the question. Again, welcome!
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Tienstra formula
Your article on the Tienstra formula is unclear, in that it provides an equation, but it doesn't provide information on what the variables in the equation represent. A figure defining the various points and angles involved is needed, or the formula is meaningless. Can you provide such a diagram? (Please keep in mind that, owing to Wikipedia's copyright policies, the image must be of your own making, not one copied from a text book or the internet.) WikiDan61 ChatMe!ReadMe!! 20:39, 12 December 2013 (UTC)