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Timeline for Proofs without words

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May 22, 2021 at 0:27 comment added lukeuser @StevenStadnicki You don't need the arc (since the tics are used to show equidistance), but surely the arc is by far the easiest way to construct the vertex at the correct position? You do after all need it to be possible to find such a point—I realise this could be taken as given, but that would make the proof slightly harder to follow in my opinion.
Nov 2, 2020 at 18:03 comment added Steven Stadnicki It might be worth noting that one doesn't need to introduce the circle here; drawing the line between the top vertex of the triangle and the interior point on the bottom edge shows that the kite-shaped quadrilateral is bilaterally symmetric (the two triangles it's split into are congruent by side-angle-side equivalence)
Jan 22, 2020 at 16:32 comment added Hans-Peter Stricker So happy to hear that! But your enjoyment could not have been greater than mine was about your answers.
Jan 22, 2020 at 16:29 comment added Joel David Hamkins Oh yes, I've enjoyed many of your questions on MO over the years.
Jan 22, 2020 at 16:21 history edited Hans-Peter Stricker CC BY-SA 4.0
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Jan 22, 2020 at 16:21 comment added Hans-Peter Stricker @JoelDavidHamkins: Happy to hear from you again after all those years;-) I made the correction. Thanks for the hint.
Jan 22, 2020 at 16:19 comment added Joel David Hamkins I think you mean to refer to the impossibility of an integer isosceles right triangle, since clearly one can have isosceles triangles with integer sides, such as an equilateral unit triangle.
Sep 5, 2018 at 21:24 history edited Hans-Peter Stricker CC BY-SA 4.0
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S Sep 5, 2018 at 20:57 history answered Hans-Peter Stricker CC BY-SA 4.0
S Sep 5, 2018 at 20:57 history made wiki Post Made Community Wiki by Hans-Peter Stricker