Respuesta :
If rstu is a rhombus, then it is a parallelogram. This means it is a four-sided plane rectilinear figure with parallel opposite sides
If a geometrical figure is rhombus
1. All sides are equal
2. Opposite sides are parallel.
3. Diagonals bisect each other at right angles.
4. Opposite angles are equal.
As, rhombus satisfies all the properties of parallelogram, so Rhombus RSTU= A Quadrilateral which is Parallelogram.
