never
scalene-0 sides congruent
isoceles-2 sides congruent
Scalene triangles those triangles in which all the sides are of different lengths, but in isosceles triangles two sides of the triangle are equal in length. Therefore, no scalene triangle can ever be isosceles.
equilateral, isosceles and scalene
They are both types of triangles
technically, triangle classes have a bulls-eye type name graph, with equilateral triangles in the middle, then isosceles, then scalene, so technically, some scalene triangles are isosceles and some are equilateral, but not all are.
Obtuse triangles can also be scalene if none of the sides are of equal length. Otherwise, it is an isosceles triangle.
the equilateral isosceles and scalene
equilateral, isosceles and scalene.
scalene, isosceles and equilateral.
equilateral, isosceles, and scalene
Equilateral, isosceles, scalene and right angle triangles.
No because they are different types of triangles
Equilateral, Isosceles and Scalene.