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yes a point is dimensionless

0D = Dot
1D = Line
2D = Plane
3D = Solid
4D = Space-time
5D = ...idk :P

Then how does it make a line?

Not the answer you are looking for?

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What do you mean?

One dimension: A line, numbers, they have only a length;

2D: Shape, Length and width
3D: Solids, Length, width and thickness

What is the definition for a line?

4D Spacetime: 3 dimentional object travelling/moving through time and space.

Straight objects without depth and width.

Is it made of many points?

Um, you can see it that way :)

When a point has no dimension then how can a collection of points make a line?

A point has no length, depth, width, when you align then, you just created a length

My doubt is when a point has zero dimension, then how can it make a line that has one dimension?

between any two points there are infinitely many numbers, do you agree?

like between 1 and 2 are there not an infinity of numbers?

Though there are infinitely many points, each has zero length, zero breadth etc.

Wouldn't 0+0+0+0........ be zero?

no, because \(0\cdot\infty\) is undefined

When 0*infinity is undefined, then how does it produce a length?

|dw:1341411610187:dw|take any line segment; I want the midpoint (whatever it is)

|dw:1341411643038:dw|now I want the midpoint of the right half

|dw:1341411666632:dw|now again, the midpoint of the right half

What does "though it is an infinity of points, they only add up to a finite line segment" mean?

an infinite amount*

How can infinite things add and give some finite value?

The sum of all terms of the geometric sequence that halves each time would be the perfect example :D

|dw:1341412717556:dw|