Mathematics, 09.09.2020 16:01 gemouljr

Question from the lawyer: "Dr. Expert, I only see a 70° angle here, Exhibit A. Kelly said that having this angle means you have a plane. From what I see, none of the definition of a plane say that an angle defines a plane. Explain how each definition proves that an angle defines a plane." 14. Definition 1: Three points that are not collinear.
Proof:

15. Definition 2: A line and a point not lying on the line.
Proof:

16. Definition 3: Two lines which intersect
Proof:

I need help with the proof :)

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Question from the lawyer: "Dr. Expert, I only see a 70° angle here, Exhibit A. Kelly said that hav...