Euclid index

Euclid Book 1 - Proposition 20
In triangle, sum of two sides greater than third


Index --- introduction --- definitions --- axioms and postulates --- propositions --- other

To be proved: In any triangle the sum of any two sides is greater than the remaining one.

Step through proof by clicking on Next line:

There is a triangle ABC.
  
  
  
  
  
  

Previous proposition - Next proposition