how many lines of symmetry has an equilateral triangle
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a trapezium
Parallelogram.
A rhombus is a quadrilateral that has no line of symmetry but has rotation symmetry. Rotation symmetry means that the shape can be rotated by a certain degree and still look the same. In the case of a rhombus, it has rotational symmetry of order 2, meaning it can be rotated by 180 degrees and still appear unchanged.
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