It's called a scalene triangle.
scalene triangle
Scalene
A triangle with 3 equal sides is an equilateral triangle. A triangle with 2 equal sides is an isosceles triangle. There is no such thing as a triangle with ONE equal side. Equal to what? If you wish to stretch it and say each side is (equal to itself only ) not equal to any others it is a scalene triangle.
A triangle with no equal side lengths is a scalene triangle.
Irregular triangle
it is a equalatiral triangle
A triangle with 2 equal side lengths is called an isosceles triangle.
An isosceles triangle
isosceles triangle
An equalateral triangle
Only two equal side lengths
The unequal side of an isosceles triangle is called the base.
A scalene triangle is a triangle that has three unequal sides.
Lengths of: equal side+equal side+base = perimeter