how to determine triplets of side lengths that can form a triangle 12cm,14cm,18cm and 2in,3in,9in and6m,8m,10m

Verified Answer :

1 and3can form the triangle
As the sum of 2sides is greater then the 3rdside
Like for first one
12+14>18
26>18
Yes

14+18>12
32>12
Yes

12+18>14
30>14
Yes

so the first set of sides can become a triangle