formula of perimeter of triangle Share with your friends Share 3 Priyanka Kedia answered this 14 View Full Answer Sejal Shinh answered this sum of all sides 3 Khushi Chhillar answered this sum of the three sides of the triangle 2 Arka Provo Ghosh answered this let a triangle is ABC.Then the formulae of the perimeter of the triangle is=AB=BC=CA 2 Subhansu answered this we can find out perimeter by doing sum of it's all sides 1