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- https://math.libretexts.org/Courses/Teachers_College_Columbia_University/Book%3A_Mathematics_for_Elementary_Teachers_(Manes)/02%3A_Spatial_RelationsGeometry is the art of good reasoning from bad drawings. – Henri Poincaré Thumbnail image by Tomruen (Own work) [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons. ...Geometry is the art of good reasoning from bad drawings. – Henri Poincaré Thumbnail image by Tomruen (Own work) [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons. ↵
- https://math.libretexts.org/Courses/Hartnell_College/Mathematics_for_Elementary_Teachers/12%3A_GeometryGeometry is the art of good reasoning from bad drawings. – Henri Poincaré Thumbnail image by Tomruen (Own work) [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons. ...Geometry is the art of good reasoning from bad drawings. – Henri Poincaré Thumbnail image by Tomruen (Own work) [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons. ↵
- https://math.libretexts.org/Courses/Coalinga_College/Math_for_Educators_(MATH_010A_and_010B_CID120)/11%3A_GeometryGeometry is the art of good reasoning from bad drawings. – Henri Poincaré Thumbnail image by Tomruen (Own work) [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons. ...Geometry is the art of good reasoning from bad drawings. – Henri Poincaré Thumbnail image by Tomruen (Own work) [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons. ↵
- https://math.libretexts.org/Courses/Coastline_College/Math_C104%3A_Mathematics_for_Elementary_Teachers_(Tran)/12%3A_GeometryGeometry is the art of good reasoning from bad drawings. – Henri Poincaré Thumbnail image by Tomruen (Own work) [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons. ...Geometry is the art of good reasoning from bad drawings. – Henri Poincaré Thumbnail image by Tomruen (Own work) [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons. ↵
- https://math.libretexts.org/Courses/Las_Positas_College/Math_27%3A_Number_Systems_for_Educators/07%3A_GeometryGeometry is the art of good reasoning from bad drawings. – Henri Poincaré Thumbnail image by Tomruen (Own work) [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons. ...Geometry is the art of good reasoning from bad drawings. – Henri Poincaré Thumbnail image by Tomruen (Own work) [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons. ↵
