in universe, is there a straight line and other geometrical forms?
967418
yes there are straight lines. what you describe is according to the earth and the solar systems that appear round due to the force that acts from all directions creating a universal container (the sphere) which is round. But look at the BIGGER picture a straight line has to exist even if it is as small as an atom (universe - meter scale). also there are other geometrical forms. infact the only reason why round is soo common in all universal shapes (objects). well think of all forces acting on a body from all sides then reason the kind of shape it will produce when all forces level out the object.
945919
Infinite.  Quadrilaterals, unlike triangles, can be "stretched" and "squished" after all of the lines are connected.  Triangles are fixed once you place the three line lengths together in a specific order.
1072921
I need to do a drawing to answer this. Anyway, here are some usefull sites:\n\nhttp://www.bymath.com/studyguide/geo/sec/geo14a.htm\n\nThe parallel postulate. If parallel lines are cut by a transversal, then corresponding angles are congruent.
953424
Yes. Right triangles have them all the time. it's called the orthocenter i think....it's been a while since Geometry.
1027618
It is quite possible for the universe to be both finite and without a boundary. No wall, but still it doesn't go on forever. Here's a way of visualizing it. Imagine that nomatter which direction you choose, you will eventually get back to your starting point if you go far enough in a 'straight' line. Impossible? Free your mind. It happens in two dimensions on the surface of a sphere. While it currently looks like the universe really is infinite, such three dimensional spheres were models used for finite universes until the data showed they are probably wrong.
834202
Absolutely.\n\nThe terms "point," "plane," "straight line," and so forth are arbitrary terms used in mathematics. \nIn reality, the exact position of a point is completely dependent on the observer and his reference. A "starting point" will never match the "ending point" for all references after a certain amount of time has passed.\nRemember, there is no reference that is perfectly at rest relative to all other references - yet each will legitimately consider its own reference as stationary.
410236
It's been too long for me.\n\nSample many definitions. Go to MATHWORLD.COM (lower case)\n2 geometric figures are CONGRUENT when one gets transformed into the other by isometry.\n\nStay with it.\n\nGRIZZ
497263
Non-Euclidean geometry is more general, spherical geometry is more specific.  There are several non-Euclidean geometries besides spherical - oblate spheroidal, cylindrical, etc.
316623
The most recent investigations (WMAP) about the shape (geometry) of our universe show that it is FLAT, meaning that it will expand infinitely, parallel lines never meet, etc.,.\n\nhttp://map.gsfc.nasa.gov/m_mm/mr_content.html
1070746
It has something to do with a mysterious underlying mathematical principle. Generally, functions are curved. Laws of nature obey simple mathematical formulas. When averaged together, round shapes are formed.
874412
i don't think so.. and what do you mean a straight line.. do you mean if you take the whole street or part of the street(like lanes)
921010
I'm going to focus on the usual non-euclidean geometry due to Lobachevsky. In that geometry, there are infinitely many lines parallel to a given line and through a given point. Squares (i.e. figures with 4 equal sides and 4 equal angles) don't have right angles. There is a pentagon with all right angles. The area of a triangle can be determined by the sum of the angles in the triangle (it is proportional to the difference of 180 degrees and the sum of the angles). There is a 'natural' unit of distance obtained from angles between parallel lines and perpendicular lines.
580033
You've probably seen the pictures of a grid with a giant funnel extending infinitely downward.  That's not the shape of the hole itself, but a map of the curvature of space near the singularity.  The singularity, or "hole" itself is a point of infinitely large density and infinitely small size.
14730
Mathematics and music are two objective languages, which not only means you cannot lie, but everyone on earth can potentially understand you...and perhaps beyond!\n\nThe Pyramids and the Gothic cathedrals were built on the principles of Sacred Geometry...from the circle comes the tringle, square, pentagon, hexagon, etc. all fundamentals in building!\n\nSnowflakes are an example of geometry in natrue. The symetry of human & animal forms, in biology, etc...
987754
Actually the only way it would be possible is if you use Elliptic or Riemannian geometry, and would require a manifold.  A representation of such a construct would be similar to drawing a 4 dimensional shape in 3 or even 2 dimensions.\n\nEuclidian geometry doesn't allow triangles with a sum of all angles to be greater than 180 degrees.
691753
maybe a hexagonal prism http://en.wikipedia.org/wiki/Hexagonal_prism http://en.wikipedia.org/wiki/Prism_%28geometry%29
335338
geometry too? try your damndest, dont EVER give up, kiss ass, lol