Answer with explanation:
On the basis of sides there are three kind of triangles
1. Scalene triangle = All Sides are Unequal.
2. Isosceles Triangle = Two Sides among three sides are equal.
3. Equilateral triangle = All three sides equal.
On the Basis of Angles , there are three kind of triangles
1. Right Angled triangle = One angle of triangle has measure equal to 90°.
2. Obtuse Angled Triangle = One angle has measure greater than 90° , but less than 180°.
3. Acute Angle triangle = All Angles of triangle less than 90°.
Option D: Scalene Triangle
A triangle with no equal sides is called a(n) Scalene triangle.