Answer:
Rhombus Side = SQUARE ROOT [(Long Diag / 2)^2 + (Short Diag / 2)^2]
Rhombus Side = SQUARE ROOT [(30 / 2)^2 + (16 / 2)^2]
Rhombus Side = SQUARE ROOT (15^2 + 2 + 8^2)
Rhombus Side = SQUARE ROOT (225 + 64)
Rhombus Side = SQUARE ROOT (289)
Rhombus Side = 17 cm
Rhombus perimeter = 4 * side = 68 centimeters
(See attached formula)
Explanation: