The area of any convex quadrilateral can be determined as , where and are the diagonals, is the angle of diagonals' intersection (90 degrees for a rhombus).
Thus, the formula simplifies to . From here, m.
Then, if we take one quarter of a rhombus, we will have a right triangle with diagonals' halves as shorter sides of triangle and side of the rhombus as hypotenuse.
Hence, side of the rhombus a = m. <---------------------------
The last thing to calculate is the altitude h. From we get m. <-----------------------------
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