Equilateral Triangle - all sides equal and all angles equal
Isosceles Triangle - two sides equal andtwo angles equal
Scalene Triangle - no sides equal and no angles equal
so
1-6 a)
Isosceles Triangle - 1 Line of Symmetry
1-6b)
Equilateral Triangle- 3 Lines of Symmetry
1-6 c)
A Parallelogram has 180 rotation symmetry, but no line of symmetry