**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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