I am wondering when we can reach a concept of a triangle that we can represent in actuality.
For example we cannot have a length of sqrt(2), but when one says that we have a unit right angle triangle with both sides 1 units and hypotenuse of sqrt(2) units we don't feel challenged about it. However I believe we should, if we take the units as meters. There is no such length as sqrt(2).
But can we represent the concept in actuality, where the right angle triangle represented by 3, 4, 5 units?
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