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#Geometry Problem 800: de Gua's Theorem, Pythagorean theorem in 3-D #Pythagoras
Details: https://t.co/MIDNBStq5t
#Geometry Problem 816 #Tangential Circumscribed #Quadrilateral #Pitot Theorem
VIew on web: https://t.co/wHzBkq2NVX
New artwork for sale! - "Einstein\'s theorem ...." - https://t.co/X5bFrNXrOa @fineartamerica