The sum of its sides.
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Perimeter of equilateral triangle: 24 units Area of equilateral triangle: 27.713 square units rounded to three decimal places
Perimeter is the sum of the sides. An equilateral triangle has three sides of equal length. So the perimeter in this case would be 7.8mm x 3 = 23.4mm.
Perimeter = 3*25 = 75 cm
12.9
An equilateral triangle that has a perimeter of 57 feet has three equal sides of 19 feet.