Proof
Suppose not; by I.5 and I.18 contradiction.
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Full neighborhood
Depends on (2)
Required by (dependents) (3)
- I.20Proposition I.20In any triangle two sides taken together in any manner are greater than the remaining one.
- I.24Proposition I.24If two triangles have the two sides equal to two sides respectively, but have the one of the angles contained by the…
- III.18Proposition III.18If a straight line touch a circle, and a straight line be joined from the centre to the point of contact, the straight…
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