Triangles have the following properties:-
  • All triangles have 3 straight sides, 3 corners (vertices), and 3 angles.
  • All triangles have angles adding up to 180°.

There are 3 main types of triangle:

1- Equilateral triangles have the following properties :-

  • Three straight sides of equal length;
  • Three angles, all equal to 60°;
  • Three lines of symmetry

2- Isosceles triangles have the following properties:

  • Two sides of equal length;
  • Two equal angles;
  • One line of symmetry.

3- Scalene triangles have the following properties:

  • No sides of equal length;
  • No equal angles;
  • No lines of symmetry.




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