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Answer» 
Triangle can have 3, or 1 or no lines of symmetry - Equilateral Triangle(all sides equal,all ANGLES equal)
- Isosceles Triangle(two sides equal,two angles equal)
- SCALENE Triangle(no sides equal, no angles equal)
Different types of Quadrilaterals (a 4-sided plane shape): - SQUARE(all sides equal,all angles 90°)
- Rectangle(opposite sides equal,all angles 90°)
- Irregular Quadrilateral has no lines of symmetry
A regular POLYGON has all sides equal, and all angles equal: - An Equilateral Triangle (3 sides) has 3 Lines of Symmetry
- Square (4 sides) has 4 Lines of Symmetry
- Regular Hexagon (6 sides) has 6 Lines of Symmetry
- Regular Heptagon (7 sides) has 7 Lines of Symmetry
- Regular Octagon (8 sides) has 8 Lines of Symmetry
A regular polygon of "n" sides has "n" Lines of Symmetry- A line (drawn at any angle) that GOES through its centre is a Line of Symmetry. So a Circle has infinite Lines of Symmetry.
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