• # question_answer If perimeter of triangle is 18 cm and any two sides are of length 5 cm and 7 cm, then length of third side will be? A) 5                      B) 6 C) 7                                  D) 8

Let length of third side = x cm Then, perimeter of triangle = 18 cm $x+5+7=18$ $x+12=18$ $x=6\,\,cm$