Question

prove that all sides of rhombus are equal

Answer 1

If the diagonals of a quadrilateral bisect all the angles, then it's a rhombus (converse of a property). ... Their four ends must form a diamond shape — a rhombus. If two consecutive sides of a parallelogram are congruent, then it's a rhombus (neither the reverse of the definition nor the converse of a property)
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