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euclidean geometry

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The sum of the angles of a triangle 2016-02-24
Sophia pose la question :
Does every triangle add up to 180 degrees? (Such as a unique triangle)
Penny Nom lui répond.
Euclid's Parallel Postulate 2013-08-20
Justin pose la question :
Hello there,

I was wondering is Euclid's Fifth Parallel Postulate of parallel lines never intersecting, undecidable or essentially undecidable?

Thank you so much for any help you can provide!

Robert Dawson lui répond.
Non-euclidean geometry 2003-12-08
Geoffrey pose la question :
How can you use non-euclidean geometry to navigate on a sphere? What geometers did work in this area?
Chris Fisher lui répond.
Non-Euclidean geometry 2003-12-03
Geoffrey pose la question :
What are the applications of Non-Euclidean geometry (especially hyperbolic and spherical)?
Walter Whiteley lui répond.
Euclidean Math puzzle 2000-01-24
Margaret Matthews pose la question :

(Check out this web-site: Simeon's Triangle Puzzle )

I have tried to figure out how this could be, because everything I know about it tells me it can't be. However, I can't seem to make it NOT work.

Two right angle triangles. They are each cut up into four identical pieces. In the first, all the pieces fit together so that there are NO empty spaces; in the second, presumed to be identical in size to the first, the pieces are slightly rearranged, and now, there IS a space in the triangle.


Patrick Maidorn and Claude Tardif lui répond.
Non-Euclidean Geometry 1999-02-10
Robert Smith pose la question :
Is non-euclidean geometry necessary for the college bound student? I have students that are inerested in teaching math one day. My school is restricted to Euclidean Geometry.
Walter Whiteley and Jack LeSage lui répond.
 
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