File:Twocolumnproof.png
Twocolumnproof.png (437 × 404 pixels, file size: 156 KB, MIME type: image/png)
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Date/Time | Dimensions | User | Comment | |
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current | 21:32, 24 July 2009 | 437 × 404 (156 KB) | File Upload Bot (Magnus Manske) | {{BotMoveToCommons|en.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} {{Information |Description={{en|Taken from Patricio G. Herbst, "Establishing a Custom of Proving in American School Geometry: Evolution |
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