Area of a Rhombus
Formulas are given below. Note that the diagonals of a rhombus are perpendicular (as is the case with all kites).
Rhombus
s = side length of rhombus h = height of rhombus d1 = long diagonal of rhombus d2 = short diagonal of rhombus
Area = hs = s2 sin A = s2 sin B = (½) d1d2
See also
Area of a kite, parallelogram, area of a parallelogram, sine