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Elements Book 1 Prop 5 - Theorem - The Angles at the Base of an Isosceles Triangle are equal between themselves; and if the equal Sides be produced, the Angles under the base shall be equal between …
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Euclid Book 1 Props I - V - A Critical Review - Sociology and Pure Mathematics - N J Wildberger
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- 1 Intro
- 2 Elements Book 1 Prop 1 - To describe and Equilateral Triangle upon a given finite Right Line.
- 3 Elements Book 1 Prop 2 - At a given Point, to put a Right Line equal to a Right Line given.
- 4 Elements Book 1 Prop 3 - Two unequal Right Lines being given, to cut off a Part from the great Equal to the lesser.
- 5 Elements Book 1 Prop 4 - Theorem
- 6 Elements Book 1 Prop 5 - Theorem - The Angles at the Base of an Isosceles Triangle are equal between themselves; and if the equal Sides be produced, the Angles under the base shall be equal between …
- 7 Problems logic with Euclid so far
- 8 Conclusion
