Definition:Triangle (Geometry)/Scalene

From ProofWiki
Jump to navigation Jump to search


A scalene triangle is a triangle in which all three sides are of different lengths.


Euclid's Definition

In the words of Euclid:

Of trilateral figures, an equilateral triangle is that which has its three sides equal, an isosceles triangle that which has two of its sides alone equal, and a scalene triangle that which has its three sides unequal.

(The Elements: Book $\text{I}$: Definition $20$)