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Guisecliff Wood

oooooh nice!!!

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true - it is just an inference. But look at Crucuno !

Should have said 'but check the Crucuno Quadrilateral'. See also somewhere in the text of http://www.neara.org/ROS/roscarnac02.htm

.. that, being a great fan of Euclid, I do think it's most likely that the 345 triangle was used