Which among the following is the perimeter of the triangle with sides a, b and c?
a+b-c
a-b+c
a+b+c
axbxc
The perimeter of a triangle = a + b + c, where a, b and c are the lengths of each side of the triangle.
D, E, F are the midpoints of the sides BC, CA and AB respectively of △ ABC. Then △ DEF is congruent to triangle –