The conversation between human and AI assistant.
[|Human|] Calculate the perimeter of an equilateral triangle with side lengths of 5
[|AI|] An equilateral triangle has three equal sides. If one side is 5 units, then the perimeter is the sum of all three sides: 

Perimeter = 5 + 5 + 5 = 15 units
[|Human|] 
Calculate the perimeter of an equilateral triangle with side lengths of 5