Asked Sep 8, 2019

Theorem P.3. ( Dual of Axiom P.4)

Given two distinct points, there is at least one line incident with both of them.


Proof Theorem P.3.



Expert Answer

Step 1

It is noted that, if two points lie in a plane, then the line joining them lies in that plane (postulate).

Step 2

Also, it is known that, the intersection of two planes is a line (postulate).

Step 3

A well known postulate states that, a li...

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3D Geometry

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