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anonymous
 4 years ago
what is a two dimensional,one dimensional figure...give examples
anonymous
 4 years ago
what is a two dimensional,one dimensional figure...give examples

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0flat piece of paper we are drawing on a plane ... ... except that the paper itself is not a plane, because it has thickness! And it should extend forever, too. wht does this mean?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0So, we're in a 3dimensional world for all intents and purposes (actually anywhere between 4 and 11, but let's not get into that). Any object we see is 3dimensional. Think of a cube  it's got length, width, and height, or you could say that it has extents in 3 different dimensions (each of which are orthogonal to the others). Another way to think of it is that you would need three numbers (coordinates) to describe the position of any point in space uniquely  it's 3dimensional space. Take a dimension away and you end up with two orthogonal dimensions. Your cube turns into a square  draw a cube from the top, and you end up with a square, in 2 dimensions. You need 2 coordinates to describe the location of any point in 2dimensional space. Now take another dimension away. You'll end up with a line. It extends only along one dimension and doesn't need another dimension to be a line. A single number can describe the location of any point along that one dimension. You could go one further and take the last dimension away, and you end up with a point ;)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0the the coordinate x and yaxis?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Yea  in 2 dimensions, you could imagine the dimensions like the axes of a coordinate system. So, for a 2dimensional system you need two numbers, for 3 dimensions 3 coordinates to describe a location. Add a fourth dimension and you need 4 numbers  think of time as a fourth dimension, and to describe any event uniquely you need to be able to tell where (x,y,z) and *when* it happened (t). So, for 4 dimensions you'd need 4 coordinates to describe the location of any point. In 0 dimensions there are no coordinates, because there are no dimensions and no extents.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0thanks opiesche.......does the room have 3 dimensions?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Yes, a room would have three dimensions. So would a cube or a sphere. Another way to visualize the 'taking away' of a dimension would be this: Place a cube (3dimensional) in front of a wall and shine a flash light on it. You'll see the shadow of the cube on the wall  in 2 dimensions. The shape of the shadow changes as you move the flash light around, but it's always in 2 dimensions. The shadow is, in fact, a 2dimensional projection of the 3dimensional cube.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Now imagine you could take another flash light , shine it down straight from the top of the shadow and have the 2dimensional shadow itself cast its own shadow on the floor (it's not possible, of course, but just imagine for a second it would be). You'd see the twodimensional shadow cast its own shadow on the floor, and that shadow would be a line  it would be onedimensional. It would be a onedimensional projection of the 2dimensional shadow ;)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0thats okay and why is a circle 2 dimensional?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0This is going to sound strange, but because it doesn't need a 3rd dimension to be a circle. You could place it in 3 dimensions, but really, all you need to describe a circle are two dimensions  the x and y coordinates that lie on the circle at a certain distance away from the radius. If you add a Z coordinate to the location on the circle (extrude the circle upwards), it would become a cylinder.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0that was supposed to say 'a certain distance away from the center.'

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0You could say that what defines how many dimensions an object has is determined by how many coordinates you need to describe any location on it. For a circle or square you need exactly two.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0do u need to be imaginative to be good at this stuff?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0It doesn't hurt to be able to visualize. I'm better at that than I am at formalizing these concepts ;) BTW, this is a really good (albeit old and maybe a little cheesy) exploration of dimensionality: http://www.youtube.com/watch?v=KIadtFJYWhw Carl Sagan was awesome.
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