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Internal representation of geometric objects
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I was wondering how geometric objects are represented in Geogebra. It
cannot be "purely" numerically, because when for instance I ask for the
relation between the two segments of a triangle inscribed in a
semicircle (diameter as its base), I get that it will always be true
that they are perpendicular. How does Geogebra "proof" this purely
geometrical property (which would, I suspect, not be exact or stable
under rounding error)? Do feel free to redirect me to other topics or
the manual. Thanks!
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