Perimeter of a triangle = (length of the first side) plus (length of the second side)
plus (length of the third side)
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you add the sides together . a /\b a+b+c /_\ c
You find the perimeter of a triangle by adding all the sides. There is no special rule for finding the perimeter.
The formula for finding out perimeters of shapes is length+length+height+height=perimeter or what else you can do is (lengthx2)+(heightx2)=PERIMETER
Lengths of: equal side+equal side+base = perimeter
Perimeter = 4*n whereas n is the length of its side