Scalene Triangle
has three sides
The side opposite to the largest angle of a triangle is the largest side
Acute Angled Triangle
polygon
Isosceles Triangle
has three angles
has three vertices
The sum of the length of any two sides of a triangle is greater than the length of the third side
Any exterior angle of the triangle is equal to the sum of its interior opposite angles
Equilateral Triangle
The sum of all internal angles of a triangle is always equal to 180°
Obtuse Angled Triangle
Right-Angled Triangle