how many lines of symmetry has an equilateral triangle
a trapezium
Parallelogram.
A parallelogram has no lines of symmetry, but it has rotational symmetry.
no shape does! * * * * * Not true. A parallelogram has rotational symmetry of order 2, but no lines of symmetry.
Rotational symmetry is based on points of rotation not lines
a trapezium
parallelogram
Parallelogram.
A parallelogram has no lines of symmetry, but it has rotational symmetry.
A rectangle.
parallegram
Parrallelogram (it has rotational symmetry but no lines of symmetry)
Blue
A parallelogram.A parallelogram.A parallelogram.A parallelogram.
no shape does! * * * * * Not true. A parallelogram has rotational symmetry of order 2, but no lines of symmetry.
Rotational symmetry is based on points of rotation not lines
Irregular shapes have NO lines of symmetry and all the sides are not the same. A regular shape WILL have lines of symmetry and all the sides are the same. * * * * * Wrong! A kite, for example, is an irregular but it has reflective symmetry. A parallelogram is an irregular quadrilateral but has rotational symmetry.