Question

Given that a triangle has two sides of lengths 5 inches and 7 inches, which is a possible length of the third side?
3 inches

2 inches

12 inches

13 inches

Answer 1

Answer: it’s 13

because 13-7-5= 1

12-5-7=0 which is invalid

7-5-2=0 which is invalid

7-5-3=-1 which is invalid