The perimeter is 219 units (73 x 3).
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Perimeter of equilateral triangle: 24 units Area of equilateral triangle: 27.713 square units rounded to three decimal places
It is: 39 units of measurement
Perimeter = 3*24.32 = 72.96 units of measurement
3*12 = 36 units
39*3 = 117 units