Question

in triangle ABC D,Eand F are respectively the mid points of bc,ca and ab if the lengths of side ab, bc and ca are 7cm , 8 cm, 9cm find the perimeter of triangle def

Answer 1

perimeter of triangle def is 12cm

Answer 2

12

The segment of line joining the middle points of two sides of a triangle is called middle segment. Lemma: A middle segment of a triangle is parallel to the third side and its lengths is half the third side's.