The conversation between human and AI assistant.
[|Human|] Calculate the perimeter of a triangle with sides 5, 6, and 7 meters.
[|AI|] The perimeter of a triangle is calculated by adding the lengths of its three sides. 

So, the perimeter of a triangle with sides 5, 6, and 7 meters is:
5 + 6 + 7 = 18 meters
[|Human|] 
Calculate the perimeter of a triangle with sides 5, 6, and 7 meters.