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Consider the undefined terms: line, point, and belongs to. Also consider the following Axioms:
Axiom 1 any two lines have exactly one point in common.
Axiom 2 Every point is on two lines.
Axiom 3 There are exactly 4 lines.
a) How many points are there? Prove your answer.
b) Prove that there are exactly three points on each line.Answers
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