A scalene triangle has two sides of equal length.

The story behind the answer

False. A scalene triangle has no equal sides—each side length is different, which also means all three angles are different. If a triangle had two equal sides, it would be isosceles; if all three were equal, it would be equilateral.

A memory trick: scalene = “sides stand alone.” Triangles are classified by sides (scalene, isosceles, equilateral) and by angles (acute, right, obtuse). Unlike isosceles and equilateral triangles, a scalene triangle has no line of symmetry and no repeated angle measures. Knowing the type lets you use the right properties: for example, base angles match in isosceles triangles, but no such equalities hold in scalene ones.