Is it possible t form a triangle with side lengths of 11.5 yd, 15.5yd and 9 yd? Proof

Given a triangle if side a, b and c where c is the longest side, then:

a+b≥c

From the dimensions given, we can assign our values as follows:

a=11.5, b=9, c=15.5

thus plugging in the inequality:

11.5+9≥15.5

20.5≥15.5

this implies that the dimensions form a triangle.